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    @kingjs/enumerable.from-each

    1.0.2 • Public • Published

    @kingjs/enumerable.from-each

    Generates a sequence of arrays or descriptors composed of a single element each from a set of arrays.

    Usage

    Generate the cross product of shirts sizes (small, medium, and large) and colors (red and green) like this:

    var fromEach = require('@kingjs/enumerable.from-each');
    var toArray = require('@kingjs/linq.to-array');
    
    var shirts = fromEach({
      size: [ 'S', 'M', 'L' ],
      color: [ 'Red', 'Green' ]
    });
    
    toArray.call(shirts);

    results:

    [
      { size: 'S', color: 'Red' },
      { size: 'M', color: 'Red' },
      { size: 'L', color: 'Red' },
      { size: 'S', color: 'Green' },
      { size: 'M', color: 'Green' },
      { size: 'L', color: 'Green' }
    ];

    Generate the same cross product except use an array instead of a descriptor to express the set of arrays like this:

    var fromEach = require('@kingjs/enumerable.from-each');
    var toArray = require('@kingjs/linq.to-array');
    
    var shirts = fromEach([
      [ 'S', 'M', 'L' ], 
      [ 'Red', 'Green' ]
    ]);
    
    toArray.call(shirts);

    result:

    [
      [ 'S', 'Red' ],
      [ 'M', 'Red' ],
      [ 'L', 'Red' ],
      [ 'S', 'Green' ],
      [ 'M', 'Green' ],
      [ 'L', 'Green' ]
    ];

    API

    function fromEach(
      data: any[][] | { [index: string]: any[] }
    ): Enumerator

    Interfaces

    Parameters

    • data: An array of arrays, or a descriptor whose every property is an array.

    Return Value

    A sequence of arrays or descriptors where each index or property is replaced with an element of its corresponding array.

    Install

    With npm installed, run

    $ npm install @kingjs/enumerable.from-each
    

    Acknowledgments

    Like nUnit ValuesAttribute and TheoryAttribute which use an odometer to generate combinations of test values from a set of arrays.

    License

    MIT

    Analytics

    Keywords

    none

    Install

    npm i @kingjs/enumerable.from-each

    DownloadsWeekly Downloads

    1

    Version

    1.0.2

    License

    MIT

    Unpacked Size

    4.83 kB

    Total Files

    4

    Last publish

    Collaborators

    • kingces95