## Uses of Interface
com.hazelcast.jet.function.ToDoubleFunctionEx

- Packages that use ToDoubleFunctionEx
  Package | Description
  --- | ---
  com.hazelcast.jet.aggregate | Contains `AggregateOperation` and several its variants, as well as a builder object for the aggregate operations.
  com.hazelcast.jet.function | Serializable and exception-declaring variants of functional interfaces from `java.util.function`.

- - ### Uses of ToDoubleFunctionEx in com.hazelcast.jet.aggregate

    Methods in com.hazelcast.jet.aggregate with parameters of type ToDoubleFunctionEx
    Modifier and Type | Method and Description
    --- | ---
    `static <T> AggregateOperation1<T,LongDoubleAccumulator,Double>` | AggregateOperations.`averagingDouble(ToDoubleFunctionEx<? super T> getDoubleValueFn)` Returns an aggregate operation that finds the arithmetic mean (aka.
    `static <T> AggregateOperation1<T,DoubleAccumulator,Double>` | AggregateOperations.`summingDouble(ToDoubleFunctionEx<? super T> getDoubleValueFn)` Returns an aggregate operation that computes the sum of the `double` values it obtains by applying `getDoubleValueFn` to each item.

  - ### Uses of ToDoubleFunctionEx in com.hazelcast.jet.function

    Methods in com.hazelcast.jet.function with parameters of type ToDoubleFunctionEx
    Modifier and Type | Method and Description
    --- | ---
    `static <T> ComparatorEx<T>` | ComparatorEx.`comparingDouble(ToDoubleFunctionEx<? super T> toKeyFn)` `Serializable` variant of `java.util.Comparator#comparingDouble(ToDoubleFunction)`.
    `default ComparatorEx<T>` | ComparatorEx.`thenComparingDouble(ToDoubleFunctionEx<? super T> toKeyFn)` `Serializable` variant of `java.util.Comparator#thenComparingDouble(ToDoubleFunction)`.

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