Type Parameters:

TSource - Element type

All Known Subinterfaces:

Enumerable<T>, ExtendedOrderedEnumerable<T>, ExtendedOrderedQueryable<T>, ExtendedQueryable<TSource>, Grouping<K,V>, Lookup<K,V>, OrderedEnumerable<T>, OrderedQueryable<T>, Queryable<T>, QueryableDefaults.Replayable<T>, RawQueryable<T>

All Known Implementing Classes:

AbstractEnumerable, AbstractEnumerable2, AbstractQueryable, AbstractTableQueryable, BaseQueryable, CalciteConnectionImpl.CalciteQueryable, CassandraTable.CassandraQueryable, DefaultEnumerable, DefaultQueryable, ElasticsearchTable.ElasticsearchQueryable, EnumerableDefaults.LookupResultEnumerable, EnumerableOrderedQueryable, EnumerableQueryable, GeodeTable.GeodeQueryable, GroupingImpl, Interpreter, JdbcTable.JdbcTableQueryable, Linq4j.CollectionEnumerable, Linq4j.CompositeEnumerable, Linq4j.IterableEnumerable, Linq4j.ListEnumerable, LookupImpl, MongoTable.MongoQueryable, Processes.ProcessLinesEnumerator, Processes.SeparatedLinesEnumerable, QueryableDefaults.NonLeafReplayableQueryable, QueryableDefaults.ReplayableQueryable, QueryProviderImpl.QueryableImpl, ResultSetEnumerable, SplunkQuery, SplunkTable.SplunkTableQueryable
```
public interface ExtendedEnumerable<TSource>
```
Extension methods in Enumerable.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`TSource`	`aggregate(Function2<TSource,TSource,TSource> func)`	Applies an accumulator function over a sequence.
`<TAccumulate> TAccumulate`	`aggregate(TAccumulate seed, Function2<TAccumulate,TSource,TAccumulate> func)`	Applies an accumulator function over a sequence.
`<TAccumulate,TResult> TResult`	`aggregate(TAccumulate seed, Function2<TAccumulate,TSource,TAccumulate> func, Function1<TAccumulate,TResult> selector)`	Applies an accumulator function over a sequence.
`boolean`	`all(Predicate1<TSource> predicate)`	Determines whether all elements of a sequence satisfy a condition.
`boolean`	`any()`	Determines whether a sequence contains any elements.
`boolean`	`any(Predicate1<TSource> predicate)`	Determines whether any element of a sequence satisfies a condition.
`Enumerable<TSource>`	`asEnumerable()`	Returns the input typed as `Enumerable<TSource>`.
`Queryable<TSource>`	`asQueryable()`	Converts an Enumerable to a `Queryable`.
`java.math.BigDecimal`	`average(BigDecimalFunction1<TSource> selector)`	Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
`double`	`average(DoubleFunction1<TSource> selector)`	Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
`float`	`average(FloatFunction1<TSource> selector)`	Computes the average of a sequence of Float values that are obtained by invoking a transform function on each element of the input sequence.
`int`	`average(IntegerFunction1<TSource> selector)`	Computes the average of a sequence of int values that are obtained by invoking a transform function on each element of the input sequence.
`long`	`average(LongFunction1<TSource> selector)`	Computes the average of a sequence of long values that are obtained by invoking a transform function on each element of the input sequence.
`java.math.BigDecimal`	`average(NullableBigDecimalFunction1<TSource> selector)`	Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Double`	`average(NullableDoubleFunction1<TSource> selector)`	Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Float`	`average(NullableFloatFunction1<TSource> selector)`	Computes the average of a sequence of nullable Float values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Integer`	`average(NullableIntegerFunction1<TSource> selector)`	Computes the average of a sequence of nullable int values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Long`	`average(NullableLongFunction1<TSource> selector)`	Computes the average of a sequence of nullable long values that are obtained by invoking a transform function on each element of the input sequence.
`<T2> Enumerable<T2>`	`cast(java.lang.Class<T2> clazz)`	Converts the elements of this Enumerable to the specified type.
`Enumerable<TSource>`	`concat(Enumerable<TSource> enumerable1)`	Concatenates two sequences.
`boolean`	`contains(TSource element)`	Determines whether a sequence contains a specified element by using the default equality comparer.
`boolean`	`contains(TSource element, EqualityComparer<TSource> comparer)`	Determines whether a sequence contains a specified element by using a specified `EqualityComparer<TSource>`.
`<TInner,TResult> Enumerable<TResult>`	`correlateJoin(CorrelateJoinType joinType, Function1<TSource,Enumerable<TInner>> inner, Function2<TSource,TInner,TResult> resultSelector)`	For each row of the current enumerable returns the correlated rows from the `inner` enumerable (nested loops join).
`int`	`count()`	Returns the number of elements in a sequence.
`int`	`count(Predicate1<TSource> predicate)`	Returns a number that represents how many elements in the specified sequence satisfy a condition.
`Enumerable<TSource>`	`defaultIfEmpty()`	Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty.
`Enumerable<TSource>`	`defaultIfEmpty(TSource value)`	Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.
`Enumerable<TSource>`	`distinct()`	Returns distinct elements from a sequence by using the default equality comparer to compare values.
`Enumerable<TSource>`	`distinct(EqualityComparer<TSource> comparer)`	Returns distinct elements from a sequence by using a specified `EqualityComparer<TSource>` to compare values.
`TSource`	`elementAt(int index)`	Returns the element at a specified index in a sequence.
`TSource`	`elementAtOrDefault(int index)`	Returns the element at a specified index in a sequence or a default value if the index is out of range.
`Enumerable<TSource>`	`except(Enumerable<TSource> enumerable1)`	Produces the set difference of two sequences by using the default equality comparer to compare values.
`Enumerable<TSource>`	`except(Enumerable<TSource> enumerable1, EqualityComparer<TSource> comparer)`	Produces the set difference of two sequences by using the specified `EqualityComparer<TSource>` to compare values.
`TSource`	`first()`	Returns the first element of a sequence.
`TSource`	`first(Predicate1<TSource> predicate)`	Returns the first element in a sequence that satisfies a specified condition.
`TSource`	`firstOrDefault()`	Returns the first element of a sequence, or a default value if the sequence contains no elements.
`TSource`	`firstOrDefault(Predicate1<TSource> predicate)`	Returns the first element of the sequence that satisfies a condition or a default value if no such element is found.
`<R> R`	`foreach(Function1<TSource,R> func)`	Performs an operation for each member of this enumeration.
`<TKey> Enumerable<Grouping<TKey,TSource>>`	`groupBy(Function1<TSource,TKey> keySelector)`	Groups the elements of a sequence according to a specified key selector function.
`<TKey> Enumerable<Grouping<TKey,TSource>>`	`groupBy(Function1<TSource,TKey> keySelector, EqualityComparer<TKey> comparer)`	Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.
`<TKey,TAccumulate,TResult> Enumerable<TResult>`	`groupBy(Function1<TSource,TKey> keySelector, Function0<TAccumulate> accumulatorInitializer, Function2<TAccumulate,TSource,TAccumulate> accumulatorAdder, Function2<TKey,TAccumulate,TResult> resultSelector)`	Groups the elements of a sequence according to a specified key selector function, initializing an accumulator for each group and adding to it each time an element with the same key is seen.
`<TKey,TAccumulate,TResult> Enumerable<TResult>`	`groupBy(Function1<TSource,TKey> keySelector, Function0<TAccumulate> accumulatorInitializer, Function2<TAccumulate,TSource,TAccumulate> accumulatorAdder, Function2<TKey,TAccumulate,TResult> resultSelector, EqualityComparer<TKey> comparer)`	Groups the elements of a sequence according to a specified key selector function, initializing an accumulator for each group and adding to it each time an element with the same key is seen.
`<TKey,TElement> Enumerable<Grouping<TKey,TElement>>`	`groupBy(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector)`	Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.
`<TKey,TElement> Enumerable<Grouping<TKey,TElement>>`	`groupBy(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector, EqualityComparer<TKey> comparer)`	Groups the elements of a sequence according to a key selector function.
`<TKey,TElement,TResult> Enumerable<TResult>`	`groupBy(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector, Function2<TKey,Enumerable<TElement>,TResult> resultSelector)`	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
`<TKey,TElement,TResult> Enumerable<TResult>`	`groupBy(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector, Function2<TKey,Enumerable<TElement>,TResult> resultSelector, EqualityComparer<TKey> comparer)`	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
`<TKey,TResult> Enumerable<TResult>`	`groupBy(Function1<TSource,TKey> keySelector, Function2<TKey,Enumerable<TSource>,TResult> resultSelector)`	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
`<TKey,TResult> Enumerable<TResult>`	`groupBy(Function1<TSource,TKey> keySelector, Function2<TKey,Enumerable<TSource>,TResult> resultSelector, EqualityComparer<TKey> comparer)`	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
`<TInner,TKey,TResult> Enumerable<TResult>`	`groupJoin(Enumerable<TInner> inner, Function1<TSource,TKey> outerKeySelector, Function1<TInner,TKey> innerKeySelector, Function2<TSource,Enumerable<TInner>,TResult> resultSelector)`	Correlates the elements of two sequences based on equality of keys and groups the results.
`<TInner,TKey,TResult> Enumerable<TResult>`	`groupJoin(Enumerable<TInner> inner, Function1<TSource,TKey> outerKeySelector, Function1<TInner,TKey> innerKeySelector, Function2<TSource,Enumerable<TInner>,TResult> resultSelector, EqualityComparer<TKey> comparer)`	Correlates the elements of two sequences based on key equality and groups the results.
`Enumerable<TSource>`	`intersect(Enumerable<TSource> enumerable1)`	Produces the set intersection of two sequences by using the default equality comparer to compare values.
`Enumerable<TSource>`	`intersect(Enumerable<TSource> enumerable1, EqualityComparer<TSource> comparer)`	Produces the set intersection of two sequences by using the specified `EqualityComparer<TSource>` to compare values.
`<C extends java.util.Collection<? super TSource>> C`	`into(C sink)`	Copies the contents of this sequence into a collection.
`<TInner,TKey,TResult> Enumerable<TResult>`	`join(Enumerable<TInner> inner, Function1<TSource,TKey> outerKeySelector, Function1<TInner,TKey> innerKeySelector, Function2<TSource,TInner,TResult> resultSelector)`	Correlates the elements of two sequences based on matching keys.
`<TInner,TKey,TResult> Enumerable<TResult>`	`join(Enumerable<TInner> inner, Function1<TSource,TKey> outerKeySelector, Function1<TInner,TKey> innerKeySelector, Function2<TSource,TInner,TResult> resultSelector, EqualityComparer<TKey> comparer)`	Correlates the elements of two sequences based on matching keys.
`<TInner,TKey,TResult> Enumerable<TResult>`	`join(Enumerable<TInner> inner, Function1<TSource,TKey> outerKeySelector, Function1<TInner,TKey> innerKeySelector, Function2<TSource,TInner,TResult> resultSelector, EqualityComparer<TKey> comparer, boolean generateNullsOnLeft, boolean generateNullsOnRight)`	Correlates the elements of two sequences based on matching keys, with optional outer join semantics.
`TSource`	`last()`	Returns the last element of a sequence.
`TSource`	`last(Predicate1<TSource> predicate)`	Returns the last element of a sequence that satisfies a specified condition.
`TSource`	`lastOrDefault()`	Returns the last element of a sequence, or a default value if the sequence contains no elements.
`TSource`	`lastOrDefault(Predicate1<TSource> predicate)`	Returns the last element of a sequence that satisfies a condition or a default value if no such element is found.
`long`	`longCount()`	Returns an long that represents the total number of elements in a sequence.
`long`	`longCount(Predicate1<TSource> predicate)`	Returns an long that represents how many elements in a sequence satisfy a condition.
`TSource`	`max()`	Returns the maximum value in a generic sequence.
`java.math.BigDecimal`	`max(BigDecimalFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum Decimal value.
`double`	`max(DoubleFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum Double value.
`float`	`max(FloatFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum Float value.
`<TResult extends java.lang.Comparable<TResult>> TResult`	`max(Function1<TSource,TResult> selector)`	Invokes a transform function on each element of a generic sequence and returns the maximum resulting value.
`int`	`max(IntegerFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum int value.
`long`	`max(LongFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum long value.
`java.math.BigDecimal`	`max(NullableBigDecimalFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value.
`java.lang.Double`	`max(NullableDoubleFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum nullable Double value.
`java.lang.Float`	`max(NullableFloatFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum nullable Float value.
`java.lang.Integer`	`max(NullableIntegerFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum nullable int value.
`java.lang.Long`	`max(NullableLongFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the maximum nullable long value.
`TSource`	`min()`	Returns the minimum value in a generic sequence.
`java.math.BigDecimal`	`min(BigDecimalFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum Decimal value.
`double`	`min(DoubleFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum Double value.
`float`	`min(FloatFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum Float value.
`<TResult extends java.lang.Comparable<TResult>> TResult`	`min(Function1<TSource,TResult> selector)`	Invokes a transform function on each element of a generic sequence and returns the minimum resulting value.
`int`	`min(IntegerFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum int value.
`long`	`min(LongFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum long value.
`java.math.BigDecimal`	`min(NullableBigDecimalFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value.
`java.lang.Double`	`min(NullableDoubleFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum nullable Double value.
`java.lang.Float`	`min(NullableFloatFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum nullable Float value.
`java.lang.Integer`	`min(NullableIntegerFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum nullable int value.
`java.lang.Long`	`min(NullableLongFunction1<TSource> selector)`	Invokes a transform function on each element of a sequence and returns the minimum nullable long value.
`<TResult> Enumerable<TResult>`	`ofType(java.lang.Class<TResult> clazz)`	Filters the elements of an Enumerable based on a specified type.
`<TKey extends java.lang.Comparable> Enumerable<TSource>`	`orderBy(Function1<TSource,TKey> keySelector)`	Sorts the elements of a sequence in ascending order according to a key.
`<TKey> Enumerable<TSource>`	`orderBy(Function1<TSource,TKey> keySelector, java.util.Comparator<TKey> comparator)`	Sorts the elements of a sequence in ascending order by using a specified comparer.
`<TKey extends java.lang.Comparable> Enumerable<TSource>`	`orderByDescending(Function1<TSource,TKey> keySelector)`	Sorts the elements of a sequence in descending order according to a key.
`<TKey> Enumerable<TSource>`	`orderByDescending(Function1<TSource,TKey> keySelector, java.util.Comparator<TKey> comparator)`	Sorts the elements of a sequence in descending order by using a specified comparer.
`<C extends java.util.Collection<? super TSource>> C`	`removeAll(C sink)`	Removes the contents of this sequence from a collection.
`Enumerable<TSource>`	`reverse()`	Inverts the order of the elements in a sequence.
`<TResult> Enumerable<TResult>`	`select(Function1<TSource,TResult> selector)`	Projects each element of a sequence into a new form.
`<TResult> Enumerable<TResult>`	`select(Function2<TSource,java.lang.Integer,TResult> selector)`	Projects each element of a sequence into a new form by incorporating the element's index.
`<TCollection,TResult> Enumerable<TResult>`	`selectMany(Function1<TSource,Enumerable<TCollection>> collectionSelector, Function2<TSource,TCollection,TResult> resultSelector)`	Projects each element of a sequence to an `Enumerable<TSource>`, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein.
`<TResult> Enumerable<TResult>`	`selectMany(Function1<TSource,Enumerable<TResult>> selector)`	Projects each element of a sequence to an `Enumerable<TSource>` and flattens the resulting sequences into one sequence.
`<TCollection,TResult> Enumerable<TResult>`	`selectMany(Function2<TSource,java.lang.Integer,Enumerable<TCollection>> collectionSelector, Function2<TSource,TCollection,TResult> resultSelector)`	Projects each element of a sequence to an `Enumerable<TSource>`, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein.
`<TResult> Enumerable<TResult>`	`selectMany(Function2<TSource,java.lang.Integer,Enumerable<TResult>> selector)`	Projects each element of a sequence to an `Enumerable<TSource>`, and flattens the resulting sequences into one sequence.
`boolean`	`sequenceEqual(Enumerable<TSource> enumerable1)`	Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.
`boolean`	`sequenceEqual(Enumerable<TSource> enumerable1, EqualityComparer<TSource> comparer)`	Determines whether two sequences are equal by comparing their elements by using a specified `EqualityComparer<TSource>`.
`TSource`	`single()`	Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence.
`TSource`	`single(Predicate1<TSource> predicate)`	Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists.
`TSource`	`singleOrDefault()`	Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.
`TSource`	`singleOrDefault(Predicate1<TSource> predicate)`	Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.
`Enumerable<TSource>`	`skip(int count)`	Bypasses a specified number of elements in a sequence and then returns the remaining elements.
`Enumerable<TSource>`	`skipWhile(Predicate1<TSource> predicate)`	Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.
`Enumerable<TSource>`	`skipWhile(Predicate2<TSource,java.lang.Integer> predicate)`	Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.
`java.math.BigDecimal`	`sum(BigDecimalFunction1<TSource> selector)`	Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
`double`	`sum(DoubleFunction1<TSource> selector)`	Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
`float`	`sum(FloatFunction1<TSource> selector)`	Computes the sum of the sequence of Float values that are obtained by invoking a transform function on each element of the input sequence.
`int`	`sum(IntegerFunction1<TSource> selector)`	Computes the sum of the sequence of int values that are obtained by invoking a transform function on each element of the input sequence.
`long`	`sum(LongFunction1<TSource> selector)`	Computes the sum of the sequence of long values that are obtained by invoking a transform function on each element of the input sequence.
`java.math.BigDecimal`	`sum(NullableBigDecimalFunction1<TSource> selector)`	Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Double`	`sum(NullableDoubleFunction1<TSource> selector)`	Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Float`	`sum(NullableFloatFunction1<TSource> selector)`	Computes the sum of the sequence of nullable Float values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Integer`	`sum(NullableIntegerFunction1<TSource> selector)`	Computes the sum of the sequence of nullable int values that are obtained by invoking a transform function on each element of the input sequence.
`java.lang.Long`	`sum(NullableLongFunction1<TSource> selector)`	Computes the sum of the sequence of nullable long values that are obtained by invoking a transform function on each element of the input sequence.
`Enumerable<TSource>`	`take(int count)`	Returns a specified number of contiguous elements from the start of a sequence.
`Enumerable<TSource>`	`takeWhile(Predicate1<TSource> predicate)`	Returns elements from a sequence as long as a specified condition is true.
`Enumerable<TSource>`	`takeWhile(Predicate2<TSource,java.lang.Integer> predicate)`	Returns elements from a sequence as long as a specified condition is true.
`java.util.List<TSource>`	`toList()`	Creates a `List<TSource>` from an `Enumerable<TSource>`.
`<TKey> Lookup<TKey,TSource>`	`toLookup(Function1<TSource,TKey> keySelector)`	Creates a `Lookup<TKey, TElement>` from an `Enumerable<TSource>` according to a specified key selector function.
`<TKey> Lookup<TKey,TSource>`	`toLookup(Function1<TSource,TKey> keySelector, EqualityComparer<TKey> comparer)`	Creates a `Lookup<TKey, TElement>` from an `Enumerable<TSource>` according to a specified key selector function and key comparer.
`<TKey,TElement> Lookup<TKey,TElement>`	`toLookup(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector)`	Creates a `Lookup<TKey, TElement>` from an `Enumerable<TSource>` according to specified key selector and element selector functions.
`<TKey,TElement> Lookup<TKey,TElement>`	`toLookup(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector, EqualityComparer<TKey> comparer)`	Creates a `Lookup<TKey, TElement>` from an `Enumerable<TSource>` according to a specified key selector function, a comparer and an element selector function.
`<TKey> java.util.Map<TKey,TSource>`	`toMap(Function1<TSource,TKey> keySelector)`	Creates a `Map<TKey, TValue>` from an `Enumerable<TSource>` according to a specified key selector function.
`<TKey> java.util.Map<TKey,TSource>`	`toMap(Function1<TSource,TKey> keySelector, EqualityComparer<TKey> comparer)`	Creates a `Map<TKey, TValue>` from an `Enumerable<TSource>` according to a specified key selector function and key comparer.
`<TKey,TElement> java.util.Map<TKey,TElement>`	`toMap(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector)`	Creates a `Map<TKey, TValue>` from an `Enumerable<TSource>` according to specified key selector and element selector functions.
`<TKey,TElement> java.util.Map<TKey,TElement>`	`toMap(Function1<TSource,TKey> keySelector, Function1<TSource,TElement> elementSelector, EqualityComparer<TKey> comparer)`	Creates a `Map<TKey, TValue>` from an `Enumerable<TSource>` according to a specified key selector function, a comparer, and an element selector function.
`Enumerable<TSource>`	`union(Enumerable<TSource> source1)`	Produces the set union of two sequences by using the default equality comparer.
`Enumerable<TSource>`	`union(Enumerable<TSource> source1, EqualityComparer<TSource> comparer)`	Produces the set union of two sequences by using a specified `EqualityComparer<TSource>`.
`Enumerable<TSource>`	`where(Predicate1<TSource> predicate)`	Filters a sequence of values based on a predicate.
`Enumerable<TSource>`	`where(Predicate2<TSource,java.lang.Integer> predicate)`	Filters a sequence of values based on a predicate.
`<T1,TResult> Enumerable<TResult>`	`zip(Enumerable<T1> source1, Function2<TSource,T1,TResult> resultSelector)`	Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

- Method Detail
  - foreach
```
<R> R foreach(Function1<TSource,R> func)
```
    Performs an operation for each member of this enumeration.
    Returns the value returned by the function for the last element in this enumeration, or null if this enumeration is empty.
    
    Type Parameters:
    
    R - Return type
    
    Parameters:
    
    func - Operation
  - aggregate
```
TSource aggregate(Function2<TSource,TSource,TSource> func)
```
    Applies an accumulator function over a sequence.
  - aggregate
```
<TAccumulate> TAccumulate aggregate(TAccumulate seed,
                                    Function2<TAccumulate,TSource,TAccumulate> func)
```
    Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value.
  - aggregate
```
<TAccumulate,TResult> TResult aggregate(TAccumulate seed,
                                              Function2<TAccumulate,TSource,TAccumulate> func,
                                              Function1<TAccumulate,TResult> selector)
```
    Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value.
  - all
```
boolean all(Predicate1<TSource> predicate)
```
    Determines whether all elements of a sequence satisfy a condition.
  - any
```
boolean any()
```
    Determines whether a sequence contains any elements. (Defined by Enumerable.)
  - any
```
boolean any(Predicate1<TSource> predicate)
```
    Determines whether any element of a sequence satisfies a condition.
  - asEnumerable
```
Enumerable<TSource> asEnumerable()
```
    Returns the input typed as Enumerable<TSource>.
    This method has no effect other than to change the compile-time type of source from a type that implements Enumerable<TSource> to Enumerable<TSource> itself.
    asEnumerable<TSource>(Enumerable<TSource>) can be used to choose between query implementations when a sequence implements Enumerable<TSource> but also has a different set of public query methods available. For example, given a generic class Table that implements Enumerable<TSource> and has its own methods such as where, select, and selectMany, a call to where would invoke the public where method of Table. A Table type that represents a database table could have a where method that takes the predicate argument as an expression tree and converts the tree to SQL for remote execution. If remote execution is not desired, for example because the predicate invokes a local method, the asEnumerable<TSource> method can be used to hide the custom methods and instead make the standard query operators available.
  - asQueryable
```
Queryable<TSource> asQueryable()
```
    Converts an Enumerable to a Queryable.
    If the type of source implements Queryable, this method returns it directly. Otherwise, it returns a Queryable that executes queries by calling the equivalent query operator methods in Enumerable instead of those in Queryable.
    
    Analogous to the LINQ's Enumerable.AsQueryable extension method.
    
    Returns:
    
    A queryable
  - average
```
java.math.BigDecimal average(BigDecimalFunction1<TSource> selector)
```
    Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
java.math.BigDecimal average(NullableBigDecimalFunction1<TSource> selector)
```
    Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
double average(DoubleFunction1<TSource> selector)
```
    Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
java.lang.Double average(NullableDoubleFunction1<TSource> selector)
```
    Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
int average(IntegerFunction1<TSource> selector)
```
    Computes the average of a sequence of int values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
java.lang.Integer average(NullableIntegerFunction1<TSource> selector)
```
    Computes the average of a sequence of nullable int values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
long average(LongFunction1<TSource> selector)
```
    Computes the average of a sequence of long values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
java.lang.Long average(NullableLongFunction1<TSource> selector)
```
    Computes the average of a sequence of nullable long values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
float average(FloatFunction1<TSource> selector)
```
    Computes the average of a sequence of Float values that are obtained by invoking a transform function on each element of the input sequence.
  - average
```
java.lang.Float average(NullableFloatFunction1<TSource> selector)
```
    Computes the average of a sequence of nullable Float values that are obtained by invoking a transform function on each element of the input sequence.
  - cast
```
<T2> Enumerable<T2> cast(java.lang.Class<T2> clazz)
```
    Converts the elements of this Enumerable to the specified type.
    This method is implemented by using deferred execution. The immediate return value is an object that stores all the information that is required to perform the action. The query represented by this method is not executed until the object is enumerated either by calling its RawEnumerable.enumerator() method directly or by using for (... in ...).
    If an element cannot be cast to type TResult, the Enumerator.current() method will throw a ClassCastException a exception when the element it accessed. To obtain only those elements that can be cast to type TResult, use the ofType(Class) method instead.
    
    See Also:
    
    EnumerableDefaults.cast(org.apache.calcite.linq4j.Enumerable<TSource>, java.lang.Class<T2>), ofType(Class)
  - concat
```
Enumerable<TSource> concat(Enumerable<TSource> enumerable1)
```
    Concatenates two sequences.
  - contains
```
boolean contains(TSource element)
```
    Determines whether a sequence contains a specified element by using the default equality comparer.
  - contains
```
boolean contains(TSource element,
                 EqualityComparer<TSource> comparer)
```
    Determines whether a sequence contains a specified element by using a specified EqualityComparer<TSource>.
  - count
```
int count()
```
    Returns the number of elements in a sequence.
  - count
```
int count(Predicate1<TSource> predicate)
```
    Returns a number that represents how many elements in the specified sequence satisfy a condition.
  - defaultIfEmpty
```
Enumerable<TSource> defaultIfEmpty()
```
    Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty.
  - defaultIfEmpty
```
Enumerable<TSource> defaultIfEmpty(TSource value)
```
    Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.
  - distinct
```
Enumerable<TSource> distinct()
```
    Returns distinct elements from a sequence by using the default equality comparer to compare values.
  - distinct
```
Enumerable<TSource> distinct(EqualityComparer<TSource> comparer)
```
    Returns distinct elements from a sequence by using a specified EqualityComparer<TSource> to compare values.
  - elementAt
```
TSource elementAt(int index)
```
    Returns the element at a specified index in a sequence.
  - elementAtOrDefault
```
TSource elementAtOrDefault(int index)
```
    Returns the element at a specified index in a sequence or a default value if the index is out of range.
  - except
```
Enumerable<TSource> except(Enumerable<TSource> enumerable1)
```
    Produces the set difference of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.)
  - except
```
Enumerable<TSource> except(Enumerable<TSource> enumerable1,
                           EqualityComparer<TSource> comparer)
```
    Produces the set difference of two sequences by using the specified EqualityComparer<TSource> to compare values.
  - first
```
TSource first()
```
    Returns the first element of a sequence. (Defined by Enumerable.)
  - first
```
TSource first(Predicate1<TSource> predicate)
```
    Returns the first element in a sequence that satisfies a specified condition.
  - firstOrDefault
```
TSource firstOrDefault()
```
    Returns the first element of a sequence, or a default value if the sequence contains no elements.
  - firstOrDefault
```
TSource firstOrDefault(Predicate1<TSource> predicate)
```
    Returns the first element of the sequence that satisfies a condition or a default value if no such element is found.
  - groupBy
```
<TKey> Enumerable<Grouping<TKey,TSource>> groupBy(Function1<TSource,TKey> keySelector)
```
    Groups the elements of a sequence according to a specified key selector function.
  - groupBy
```
<TKey> Enumerable<Grouping<TKey,TSource>> groupBy(Function1<TSource,TKey> keySelector,
                                                        EqualityComparer<TKey> comparer)
```
    Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.
  - groupBy
```
<TKey,TElement> Enumerable<Grouping<TKey,TElement>> groupBy(Function1<TSource,TKey> keySelector,
                                                                        Function1<TSource,TElement> elementSelector)
```
    Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.
  - groupBy
```
<TKey,TElement> Enumerable<Grouping<TKey,TElement>> groupBy(Function1<TSource,TKey> keySelector,
                                                                        Function1<TSource,TElement> elementSelector,
                                                                        EqualityComparer<TKey> comparer)
```
    Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function.
  - groupBy
```
<TKey,TResult> Enumerable<TResult> groupBy(Function1<TSource,TKey> keySelector,
                                                 Function2<TKey,Enumerable<TSource>,TResult> resultSelector)
```
    Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
  - groupBy
```
<TKey,TResult> Enumerable<TResult> groupBy(Function1<TSource,TKey> keySelector,
                                                 Function2<TKey,Enumerable<TSource>,TResult> resultSelector,
                                                 EqualityComparer<TKey> comparer)
```
    Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer.
  - groupBy
```
<TKey,TElement,TResult> Enumerable<TResult> groupBy(Function1<TSource,TKey> keySelector,
                                                                Function1<TSource,TElement> elementSelector,
                                                                Function2<TKey,Enumerable<TElement>,TResult> resultSelector)
```
    Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function.
  - groupBy
```
<TKey,TElement,TResult> Enumerable<TResult> groupBy(Function1<TSource,TKey> keySelector,
                                                                Function1<TSource,TElement> elementSelector,
                                                                Function2<TKey,Enumerable<TElement>,TResult> resultSelector,
                                                                EqualityComparer<TKey> comparer)
```
    Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.
  - groupBy
```
<TKey,TAccumulate,TResult> Enumerable<TResult> groupBy(Function1<TSource,TKey> keySelector,
                                                                   Function0<TAccumulate> accumulatorInitializer,
                                                                   Function2<TAccumulate,TSource,TAccumulate> accumulatorAdder,
                                                                   Function2<TKey,TAccumulate,TResult> resultSelector)
```
    Groups the elements of a sequence according to a specified key selector function, initializing an accumulator for each group and adding to it each time an element with the same key is seen. Creates a result value from each accumulator and its key using a specified function.
  - groupBy
```
<TKey,TAccumulate,TResult> Enumerable<TResult> groupBy(Function1<TSource,TKey> keySelector,
                                                                   Function0<TAccumulate> accumulatorInitializer,
                                                                   Function2<TAccumulate,TSource,TAccumulate> accumulatorAdder,
                                                                   Function2<TKey,TAccumulate,TResult> resultSelector,
                                                                   EqualityComparer<TKey> comparer)
```
    Groups the elements of a sequence according to a specified key selector function, initializing an accumulator for each group and adding to it each time an element with the same key is seen. Creates a result value from each accumulator and its key using a specified function. Key values are compared by using a specified comparer.
  - groupJoin
```
<TInner,TKey,TResult> Enumerable<TResult> groupJoin(Enumerable<TInner> inner,
                                                                Function1<TSource,TKey> outerKeySelector,
                                                                Function1<TInner,TKey> innerKeySelector,
                                                                Function2<TSource,Enumerable<TInner>,TResult> resultSelector)
```
    Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys.
  - groupJoin
```
<TInner,TKey,TResult> Enumerable<TResult> groupJoin(Enumerable<TInner> inner,
                                                                Function1<TSource,TKey> outerKeySelector,
                                                                Function1<TInner,TKey> innerKeySelector,
                                                                Function2<TSource,Enumerable<TInner>,TResult> resultSelector,
                                                                EqualityComparer<TKey> comparer)
```
    Correlates the elements of two sequences based on key equality and groups the results. A specified EqualityComparer<TSource> is used to compare keys.
  - intersect
```
Enumerable<TSource> intersect(Enumerable<TSource> enumerable1)
```
    Produces the set intersection of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.)
  - intersect
```
Enumerable<TSource> intersect(Enumerable<TSource> enumerable1,
                              EqualityComparer<TSource> comparer)
```
    Produces the set intersection of two sequences by using the specified EqualityComparer<TSource> to compare values.
  - into
```
<C extends java.util.Collection<? super TSource>> C into(C sink)
```
    Copies the contents of this sequence into a collection.
  - removeAll
```
<C extends java.util.Collection<? super TSource>> C removeAll(C sink)
```
    Removes the contents of this sequence from a collection.
  - join
```
<TInner,TKey,TResult> Enumerable<TResult> join(Enumerable<TInner> inner,
                                                           Function1<TSource,TKey> outerKeySelector,
                                                           Function1<TInner,TKey> innerKeySelector,
                                                           Function2<TSource,TInner,TResult> resultSelector)
```
    Correlates the elements of two sequences based on matching keys. The default equality comparer is used to compare keys.
  - join
```
<TInner,TKey,TResult> Enumerable<TResult> join(Enumerable<TInner> inner,
                                                           Function1<TSource,TKey> outerKeySelector,
                                                           Function1<TInner,TKey> innerKeySelector,
                                                           Function2<TSource,TInner,TResult> resultSelector,
                                                           EqualityComparer<TKey> comparer)
```
    Correlates the elements of two sequences based on matching keys. A specified EqualityComparer<TSource> is used to compare keys.
  - join
```
<TInner,TKey,TResult> Enumerable<TResult> join(Enumerable<TInner> inner,
                                                           Function1<TSource,TKey> outerKeySelector,
                                                           Function1<TInner,TKey> innerKeySelector,
                                                           Function2<TSource,TInner,TResult> resultSelector,
                                                           EqualityComparer<TKey> comparer,
                                                           boolean generateNullsOnLeft,
                                                           boolean generateNullsOnRight)
```
    Correlates the elements of two sequences based on matching keys, with optional outer join semantics. A specified EqualityComparer<TSource> is used to compare keys.
    A left join generates nulls on right, and vice versa:
    
    Join types
    Join type generateNullsOnLeft generateNullsOnRight
    
    INNER false false
    
    LEFT false true
    
    RIGHT true false
    
    FULL true true
  - correlateJoin
```
<TInner,TResult> Enumerable<TResult> correlateJoin(CorrelateJoinType joinType,
                                                         Function1<TSource,Enumerable<TInner>> inner,
                                                         Function2<TSource,TInner,TResult> resultSelector)
```
    For each row of the current enumerable returns the correlated rows from the inner enumerable (nested loops join).
    
    Parameters:
    
    joinType - inner, left, semi or anti join type
    
    inner - generator of inner enumerable
    
    resultSelector - selector of the result. For semi/anti join inner argument is always null.
  - last
```
TSource last()
```
    Returns the last element of a sequence. (Defined by Enumerable.)
  - last
```
TSource last(Predicate1<TSource> predicate)
```
    Returns the last element of a sequence that satisfies a specified condition.
  - lastOrDefault
```
TSource lastOrDefault()
```
    Returns the last element of a sequence, or a default value if the sequence contains no elements.
  - lastOrDefault
```
TSource lastOrDefault(Predicate1<TSource> predicate)
```
    Returns the last element of a sequence that satisfies a condition or a default value if no such element is found.
  - longCount
```
long longCount()
```
    Returns an long that represents the total number of elements in a sequence.
  - longCount
```
long longCount(Predicate1<TSource> predicate)
```
    Returns an long that represents how many elements in a sequence satisfy a condition.
  - max
```
TSource max()
```
    Returns the maximum value in a generic sequence.
  - max
```
java.math.BigDecimal max(BigDecimalFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum Decimal value.
  - max
```
java.math.BigDecimal max(NullableBigDecimalFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value.
  - max
```
double max(DoubleFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum Double value.
  - max
```
java.lang.Double max(NullableDoubleFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum nullable Double value.
  - max
```
int max(IntegerFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum int value.
  - max
```
java.lang.Integer max(NullableIntegerFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum nullable int value. (Defined by Enumerable.)
  - max
```
long max(LongFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum long value.
  - max
```
java.lang.Long max(NullableLongFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum nullable long value. (Defined by Enumerable.)
  - max
```
float max(FloatFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum Float value.
  - max
```
java.lang.Float max(NullableFloatFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the maximum nullable Float value.
  - max
```
<TResult extends java.lang.Comparable<TResult>> TResult max(Function1<TSource,TResult> selector)
```
    Invokes a transform function on each element of a generic sequence and returns the maximum resulting value.
  - min
```
TSource min()
```
    Returns the minimum value in a generic sequence.
  - min
```
java.math.BigDecimal min(BigDecimalFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum Decimal value.
  - min
```
java.math.BigDecimal min(NullableBigDecimalFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value.
  - min
```
double min(DoubleFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum Double value.
  - min
```
java.lang.Double min(NullableDoubleFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum nullable Double value.
  - min
```
int min(IntegerFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum int value.
  - min
```
java.lang.Integer min(NullableIntegerFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum nullable int value. (Defined by Enumerable.)
  - min
```
long min(LongFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum long value.
  - min
```
java.lang.Long min(NullableLongFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum nullable long value. (Defined by Enumerable.)
  - min
```
float min(FloatFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum Float value.
  - min
```
java.lang.Float min(NullableFloatFunction1<TSource> selector)
```
    Invokes a transform function on each element of a sequence and returns the minimum nullable Float value.
  - min
```
<TResult extends java.lang.Comparable<TResult>> TResult min(Function1<TSource,TResult> selector)
```
    Invokes a transform function on each element of a generic sequence and returns the minimum resulting value.
  - ofType
```
<TResult> Enumerable<TResult> ofType(java.lang.Class<TResult> clazz)
```
    Filters the elements of an Enumerable based on a specified type.
    Analogous to LINQ's Enumerable.OfType extension method.
    
    Type Parameters:
    
    TResult - Target type
    
    Parameters:
    
    clazz - Target type
    
    Returns:
    
    Collection of T2
  - orderBy
```
<TKey extends java.lang.Comparable> Enumerable<TSource> orderBy(Function1<TSource,TKey> keySelector)
```
    Sorts the elements of a sequence in ascending order according to a key.
  - orderBy
```
<TKey> Enumerable<TSource> orderBy(Function1<TSource,TKey> keySelector,
                                   java.util.Comparator<TKey> comparator)
```
    Sorts the elements of a sequence in ascending order by using a specified comparer.
  - orderByDescending
```
<TKey extends java.lang.Comparable> Enumerable<TSource> orderByDescending(Function1<TSource,TKey> keySelector)
```
    Sorts the elements of a sequence in descending order according to a key.
  - orderByDescending
```
<TKey> Enumerable<TSource> orderByDescending(Function1<TSource,TKey> keySelector,
                                             java.util.Comparator<TKey> comparator)
```
    Sorts the elements of a sequence in descending order by using a specified comparer.
  - reverse
```
Enumerable<TSource> reverse()
```
    Inverts the order of the elements in a sequence.
  - select
```
<TResult> Enumerable<TResult> select(Function1<TSource,TResult> selector)
```
    Projects each element of a sequence into a new form.
  - select
```
<TResult> Enumerable<TResult> select(Function2<TSource,java.lang.Integer,TResult> selector)
```
    Projects each element of a sequence into a new form by incorporating the element's index.
  - selectMany
```
<TResult> Enumerable<TResult> selectMany(Function1<TSource,Enumerable<TResult>> selector)
```
    Projects each element of a sequence to an Enumerable<TSource> and flattens the resulting sequences into one sequence.
  - selectMany
```
<TResult> Enumerable<TResult> selectMany(Function2<TSource,java.lang.Integer,Enumerable<TResult>> selector)
```
    Projects each element of a sequence to an Enumerable<TSource>, and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element.
  - selectMany
```
<TCollection,TResult> Enumerable<TResult> selectMany(Function2<TSource,java.lang.Integer,Enumerable<TCollection>> collectionSelector,
                                                           Function2<TSource,TCollection,TResult> resultSelector)
```
    Projects each element of a sequence to an Enumerable<TSource>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element.
  - selectMany
```
<TCollection,TResult> Enumerable<TResult> selectMany(Function1<TSource,Enumerable<TCollection>> collectionSelector,
                                                           Function2<TSource,TCollection,TResult> resultSelector)
```
    Projects each element of a sequence to an Enumerable<TSource>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein.
  - sequenceEqual
```
boolean sequenceEqual(Enumerable<TSource> enumerable1)
```
    Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.
  - sequenceEqual
```
boolean sequenceEqual(Enumerable<TSource> enumerable1,
                      EqualityComparer<TSource> comparer)
```
    Determines whether two sequences are equal by comparing their elements by using a specified EqualityComparer<TSource>.
  - single
```
TSource single()
```
    Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence.
  - single
```
TSource single(Predicate1<TSource> predicate)
```
    Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists.
  - singleOrDefault
```
TSource singleOrDefault()
```
    Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.
  - singleOrDefault
```
TSource singleOrDefault(Predicate1<TSource> predicate)
```
    Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.
  - skip
```
Enumerable<TSource> skip(int count)
```
    Bypasses a specified number of elements in a sequence and then returns the remaining elements.
  - skipWhile
```
Enumerable<TSource> skipWhile(Predicate1<TSource> predicate)
```
    Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.
  - skipWhile
```
Enumerable<TSource> skipWhile(Predicate2<TSource,java.lang.Integer> predicate)
```
    Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function.
  - sum
```
java.math.BigDecimal sum(BigDecimalFunction1<TSource> selector)
```
    Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
java.math.BigDecimal sum(NullableBigDecimalFunction1<TSource> selector)
```
    Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
double sum(DoubleFunction1<TSource> selector)
```
    Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
java.lang.Double sum(NullableDoubleFunction1<TSource> selector)
```
    Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
int sum(IntegerFunction1<TSource> selector)
```
    Computes the sum of the sequence of int values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
java.lang.Integer sum(NullableIntegerFunction1<TSource> selector)
```
    Computes the sum of the sequence of nullable int values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
long sum(LongFunction1<TSource> selector)
```
    Computes the sum of the sequence of long values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
java.lang.Long sum(NullableLongFunction1<TSource> selector)
```
    Computes the sum of the sequence of nullable long values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
float sum(FloatFunction1<TSource> selector)
```
    Computes the sum of the sequence of Float values that are obtained by invoking a transform function on each element of the input sequence.
  - sum
```
java.lang.Float sum(NullableFloatFunction1<TSource> selector)
```
    Computes the sum of the sequence of nullable Float values that are obtained by invoking a transform function on each element of the input sequence.
  - take
```
Enumerable<TSource> take(int count)
```
    Returns a specified number of contiguous elements from the start of a sequence.
  - takeWhile
```
Enumerable<TSource> takeWhile(Predicate1<TSource> predicate)
```
    Returns elements from a sequence as long as a specified condition is true.
  - takeWhile
```
Enumerable<TSource> takeWhile(Predicate2<TSource,java.lang.Integer> predicate)
```
    Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function.
  - toMap
```
<TKey> java.util.Map<TKey,TSource> toMap(Function1<TSource,TKey> keySelector)
```
    Creates a Map<TKey, TValue> from an Enumerable<TSource> according to a specified key selector function.
    NOTE: Called toDictionary in LINQ.NET.
  - toMap
```
<TKey> java.util.Map<TKey,TSource> toMap(Function1<TSource,TKey> keySelector,
                                               EqualityComparer<TKey> comparer)
```
    Creates a Map<TKey, TValue> from an Enumerable<TSource> according to a specified key selector function and key comparer.
  - toMap
```
<TKey,TElement> java.util.Map<TKey,TElement> toMap(Function1<TSource,TKey> keySelector,
                                                               Function1<TSource,TElement> elementSelector)
```
    Creates a Map<TKey, TValue> from an Enumerable<TSource> according to specified key selector and element selector functions.
  - toMap
```
<TKey,TElement> java.util.Map<TKey,TElement> toMap(Function1<TSource,TKey> keySelector,
                                                               Function1<TSource,TElement> elementSelector,
                                                               EqualityComparer<TKey> comparer)
```
    Creates a Map<TKey, TValue> from an Enumerable<TSource> according to a specified key selector function, a comparer, and an element selector function.
  - toList
```
java.util.List<TSource> toList()
```
    Creates a List<TSource> from an Enumerable<TSource>.
  - toLookup
```
<TKey> Lookup<TKey,TSource> toLookup(Function1<TSource,TKey> keySelector)
```
    Creates a Lookup<TKey, TElement> from an Enumerable<TSource> according to a specified key selector function.
  - toLookup
```
<TKey> Lookup<TKey,TSource> toLookup(Function1<TSource,TKey> keySelector,
                                           EqualityComparer<TKey> comparer)
```
    Creates a Lookup<TKey, TElement> from an Enumerable<TSource> according to a specified key selector function and key comparer.
  - toLookup
```
<TKey,TElement> Lookup<TKey,TElement> toLookup(Function1<TSource,TKey> keySelector,
                                                           Function1<TSource,TElement> elementSelector)
```
    Creates a Lookup<TKey, TElement> from an Enumerable<TSource> according to specified key selector and element selector functions.
  - toLookup
```
<TKey,TElement> Lookup<TKey,TElement> toLookup(Function1<TSource,TKey> keySelector,
                                                           Function1<TSource,TElement> elementSelector,
                                                           EqualityComparer<TKey> comparer)
```
    Creates a Lookup<TKey, TElement> from an Enumerable<TSource> according to a specified key selector function, a comparer and an element selector function.
  - union
```
Enumerable<TSource> union(Enumerable<TSource> source1)
```
    Produces the set union of two sequences by using the default equality comparer.
  - union
```
Enumerable<TSource> union(Enumerable<TSource> source1,
                          EqualityComparer<TSource> comparer)
```
    Produces the set union of two sequences by using a specified EqualityComparer<TSource>.
  - where
```
Enumerable<TSource> where(Predicate1<TSource> predicate)
```
    Filters a sequence of values based on a predicate.
  - where
```
Enumerable<TSource> where(Predicate2<TSource,java.lang.Integer> predicate)
```
    Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.
  - zip
```
<T1,TResult> Enumerable<TResult> zip(Enumerable<T1> source1,
                                           Function2<TSource,T1,TResult> resultSelector)
```
    Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

Join type	generateNullsOnLeft	generateNullsOnRight
INNER	false	false
LEFT	false	true
RIGHT	true	false
FULL	true	true

Interface ExtendedEnumerable<TSource>

Method Summary

Method Detail

foreach

aggregate

aggregate

aggregate

all

any

any

asEnumerable

asQueryable

average

average

average

average

average

average

average

average

average

average

cast

concat

contains

contains

count

count

defaultIfEmpty

defaultIfEmpty

distinct

distinct

elementAt

elementAtOrDefault

except

except

first

first

firstOrDefault

firstOrDefault

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupBy

groupJoin

groupJoin

intersect

intersect

into

removeAll

join

join

join

correlateJoin

last

last

lastOrDefault

lastOrDefault

longCount

longCount

max

max

max

max

max

max

max

max

max

max

max

max

min

min