@stdlib/iter-push
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    0.0.6 • Public • Published

    iterPush

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    Create an iterator which appends additional values to the end of a provided iterator.

    Installation

    npm install @stdlib/iter-push

    Usage

    var iterPush = require( '@stdlib/iter-push' );

    iterPush( iterator, ...items )

    Returns an iterator which appends additional values to the end of a provided iterator.

    var array2iterator = require( '@stdlib/array-to-iterator' );
    
    var it = iterPush( array2iterator( [ 1, 2 ] ), 3, 4 );
    // returns <Object>
    
    var v = it.next().value;
    // returns 1
    
    v = it.next().value;
    // returns 2
    
    v = it.next().value;
    // returns 3
    
    v = it.next().value;
    // returns 4
    
    var bool = it.next().done;
    // returns true

    The returned iterator protocol-compliant object has the following properties:

    • next: function which returns an iterator protocol-compliant object containing the next iterated value (if one exists) assigned to a value property and a done property having a boolean value indicating whether the iterator is finished.
    • return: function which closes an iterator and returns a single (optional) argument in an iterator protocol-compliant object.

    Notes

    • If an environment supports Symbol.iterator and a provided iterator is iterable, the returned iterator is iterable.

    Examples

    var randu = require( '@stdlib/random-iter-randu' );
    var iterPush = require( '@stdlib/iter-push' );
    
    // Create a seeded iterator for generating pseudorandom numbers:
    var rand = randu({
        'seed': 1234,
        'iter': 10
    });
    
    // Create an iterator with appended values:
    var it = iterPush( rand, 'beep', 'boop' );
    
    // Perform manual iteration...
    var v;
    while ( true ) {
        v = it.next();
        if ( v.done ) {
            break;
        }
        console.log( v.value );
    }

    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/iter-push

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    8

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    41.9 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser