npm package: @stdlib/array-base-bifurcate-values
Description: Split array element values into two groups.
Author: The Stdlib Authors
Latest version: 0.2.3

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# bifurcateValues

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> Split array element values into two groups.

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<section class="intro">

</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/array-base-bifurcate-values
```

</section>

<section class="usage">

## Usage

```javascript
var bifurcateValues = require( '@stdlib/array-base-bifurcate-values' );
```

#### bifurcateValues( x, filter )

Splits array element values into two groups.

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

var out = bifurcateValues( x, filter );
// returns [ [ 'beep', 'boop', 'bar' ], [ 'foo' ] ]
```

</section>

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<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## 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.

</section>

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<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var take = require( '@stdlib/array-base-take-indexed' );
var bifurcateValues = require( '@stdlib/array-base-bifurcate-values' );

// 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 = bifurcateValues( x, groups );
// returns [...]

console.log( out );
```

</section>

<!-- /.examples -->

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* * *

## Notice

This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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