npm package: @stdlib/array-base-take-indexed
Description: Take elements from an indexed array.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
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    About stdlib...
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# takeIndexed

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Take elements from an indexed array.

<section class="installation">

## Installation

```bash
npm install @stdlib/array-base-take-indexed
```

</section>

<section class="usage">

## Usage

```javascript
var takeIndexed = require( '@stdlib/array-base-take-indexed' );
```

#### takeIndexed( x, indices )

Takes elements from an indexed array.

```javascript
var x = [ 1, 2, 3, 4 ];

var y = takeIndexed( x, [ 1, 3 ] );
// returns [ 2, 4 ]
```

If `indices` is an empty array, the function returns an empty array.

```javascript
var x = [ 1, 2, 3, 4 ];

var y = takeIndexed( x, [] );
// returns []
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   The function does **not** perform bounds checking. If an index is less than zero or greater than the maximum index of `x`, the value of the corresponding element in the output array is undefined.
-   An _indexed_ array-like object is a data structure in which one retrieves elements via integer indices using bracket `[]` notation (e.g., `Float64Array`, `Int32Array`, `Array`, etc). This is in contrast to an _accessor_ array-like object in which one retrieves elements using `get` and `set` methods (e.g., `Complex64Array` and `Complex128Array`).

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var filledBy = require( '@stdlib/array-base-filled-by' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var linspace = require( '@stdlib/array-base-linspace' );
var takeIndexed = require( '@stdlib/array-base-take-indexed' );

// Generate a linearly spaced array:
var x = linspace( 0, 100, 11 );

// Generate an array of random indices:
var N = discreteUniform( 5, 15 );
var indices = filledBy( N, discreteUniform.factory( 0, x.length-1 ) );

// Take a random sample of elements from `x`:
var y = takeIndexed( x, indices );

console.log( x );
console.log( indices );
console.log( y );
```

</section>

<!-- /.examples -->

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<section class="related">

</section>

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<section class="main-repo" >

* * *

## 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].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

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

</section>

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[umd]: https://github.com/umdjs/umd
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