@stdlib/array-base-bifurcate-entries

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bifurcateEntries

Split array element entries into two groups.

Installation

npm install @stdlib/array-base-bifurcate-entries

Usage

var bifurcateEntries = require( '@stdlib/array-base-bifurcate-entries' );

bifurcateEntries( x, filter )

Splits array element entries into two groups.

var x = [ 'beep', 'boop', 'foo', 'bar' ];
var filter = [ true, true, false, true ];

var out = bifurcateEntries( x, filter );
// returns [ [ [ 0, 'beep' ], [ 1, 'boop' ], [ 3, 'bar' ] ], [ [ 2, 'foo' ] ] ]

Notes

• If an element in filter is truthy, the corresponding element in the input array x belongs to the first group; otherwise, the input array element belongs to the second group.

Examples

var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var take = require( '@stdlib/array-base-take-indexed' );
var bifurcateEntries = require( '@stdlib/array-base-bifurcate-entries' );

// Define an initial array of values:
var values = [ 'beep', 'boop', 'foo', 'bar', 'woot', 'woot' ];

// Sample from the initial array to generate a random collection:
var indices = discreteUniform( 100, 0, values.length-1, {
    'dtype': 'generic'
});
var x = take( values, indices );
// returns [...]

// Randomly assign collection values to groups:
var groups = discreteUniform( x.length, 0, 1, {
    'dtype': 'generic'
});

// Group the values:
var out = bifurcateEntries( x, groups );
// returns [...]

console.log( out );

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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.

Community

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License

See LICENSE.

Copyright

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