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https://github.com/stdlib-js/array-base-filled-by

Create a filled generic array according to a provided callback function.
https://github.com/stdlib-js/array-base-filled-by

alloc allocate array callback data fill filled foreach generic javascript map node node-js nodejs stdlib structure types

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

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README 

        



  

    About stdlib...

  

  
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When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.


  
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# filledBy



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



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



## Installation



```bash

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

```



Alternatively,



-   To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).

-   If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).

-   For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).



The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.



To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.



## 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`.



```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

```



## Examples



```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 ]

```



* * *



## 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 © 2016-2024. The Stdlib [Authors][stdlib-authors].



[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=main

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



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

[coverage-url]: https://codecov.io/github/stdlib-js/array-base-filled-by?branch=main



[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg

[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im



[stdlib]: https://github.com/stdlib-js/stdlib



[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors



[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