npm package: @stdlib/array-base-filled-by
Description: Create a filled generic array according to a provided callback function.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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# filledBy

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

> Create a filled "generic" array according to a provided callback function.

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</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/array-base-filled-by
```

</section>

<section class="usage">

## Usage

```javascript
var filledBy = require( '@stdlib/array-base-filled-by' );
```

#### filledBy( len, clbk\[, thisArg] )

Returns a filled "generic" array according to a provided callback function.

```javascript
function clbk( i ) {
    return i;
}

var out = filledBy( 3, clbk );
// returns [ 0, 1, 2 ]
```

When invoked, a callback function is provided a single argument:

-   **index**: the current array index.

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable no-invalid-this -->

```javascript
function clbk( i ) {
    this.count += 1;
    return i;
}

var ctx = {
    'count': 0
};

var out = filledBy( 3, clbk, ctx );
// returns [ 0, 1, 2 ];

var cnt = ctx.count;
// returns 3
```

</section>

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<section class="notes">

</section>

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<section class="examples">

## Examples

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

```javascript
var constantFunction = require( '@stdlib/utils-constant-function' );
var filledBy = require( '@stdlib/array-base-filled-by' );

var out = filledBy( 3, constantFunction( 0.0 ) );
// returns [ 0.0, 0.0, 0.0 ]

out = filledBy( 3, constantFunction( 'beep' ) );
// returns [ 'beep', 'beep', 'beep' ]

out = filledBy( 3, constantFunction( null ) );
// returns [ null, null, null ]

out = filledBy( 3, constantFunction( true ) );
// returns [ true, true, true ]

out = filledBy( 3, constantFunction( void 0 ) );
// returns [ undefined, undefined, undefined ]
```

</section>

<!-- /.examples -->

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/array-base/filled`][@stdlib/array/base/filled]</span><span class="delimiter">: </span><span class="description">create a filled generic array.</span>

</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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[npm-image]: http://img.shields.io/npm/v/@stdlib/array-base-filled-by.svg
[npm-url]: https://npmjs.org/package/@stdlib/array-base-filled-by

[test-image]: https://github.com/stdlib-js/array-base-filled-by/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/array-base-filled-by/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-base-filled-by/main.svg
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[stdlib]: https://github.com/stdlib-js/stdlib

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/array-base-filled-by/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-base-filled-by/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-base-filled-by/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-base-filled-by/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-base-filled-by/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-base-filled-by/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-base-filled-by/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-base-filled-by/main/LICENSE

<!-- <related-links> -->

[@stdlib/array/base/filled]: https://www.npmjs.com/package/@stdlib/array-base-filled

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</section>

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