## Module Overview

The `lang.stream` module corresponds to basic type stream.


A type parameter that is a subtype of `error`.
Has the special semantic that when used in a declaration
all uses in the declaration must refer to same type.


ErrorType

Applies a function to each member of a stream and returns a stream of the results.



'map

Type

CompletionType

stream

func

Type1

new stream containing result of applying function `func` to each member of parameter `stm` in order


Closes a stream.

This releases any system resources being used by the stream.
Closing a stream that has already been closed has no efffect and returns `()`.



close

() if the close completed successfully, otherwise an error


Selects the members from a stream for which a function returns true.



filter

a predicate to apply to each member to test whether it should be selected


boolean

new stream only containing members of parameter `stm` for which function `func` evaluates to true


Applies a function to each member of a stream.

The function `func` is applied to each member of parameter `stm` stream in order.



forEach

iterator

a new iterator object that will iterate over the members of parameter `stm`.


object {
    public isolated function next() returns record {|
        Type value;
    |}|CompletionType;
}

Returns the next element in the stream wrapped in a record or () if the stream ends.



strm

If the stream has elements, return the element wrapped in a record with single field called `value`,
otherwise returns ()


Combines the members of a stream using a combining function.

The combining function takes the combined value so far and a member of the stream,
and returns a new combined value.



reduce

initial value for the first argument of combining function `func`


initial

result of combining the members of parameter `stm` using function `func`


The `lang.stream` module corresponds to basic type stream.


A type parameter that is a subtype of `any|error`.
Has the special semantic that when used in a declaration
all uses in the declaration must refer to same type.


ballerina/lang.stream : 0.0.0

Module Overview

Functions

Types

Errors

Type	A type parameter that is a subtype of `any\|error`.
Type1	A type parameter that is a subtype of `any\|error`.