Create a filled array having the same length and data type as a provided array.
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> Create a filled array having the same length and data type as a provided array.
``bash`
npm install @stdlib/array-full-like
`javascript`
var fullLike = require( '@stdlib/array-full-like' );
#### fullLike( x, value\[, dtype] )
Creates a filled array having the same length and [data type][@stdlib/array/dtypes] as a provided array x.
`javascript
var x = [ 1, 2, 3, 4, 5 ];
var arr = fullLike( x, 1 );
// returns [ 1, 1, 1, 1, 1 ]
`
By default, the output array [data type][@stdlib/array/dtypes] is inferred from the provided array x. To return an array having a different [data type][@stdlib/array/dtypes], provide a dtype argument.
`javascript
var x = [ 1, 1 ];
var arr = fullLike( x, 1, 'int32' );
// returns
`
- If provided a number and the output array [data type][@stdlib/array/dtypes] is a complex number [data type][@stdlib/array/dtypes], the function returns a complex number array where each element has a real component whose value equals the provided fill value and where each element has an imaginary component equal to 0.
`javascript
var dtypes = require( '@stdlib/array-dtypes' );
var zeros = require( '@stdlib/array-zeros' );
var fullLike = require( '@stdlib/array-full-like' );
// Create a zero-filled array:
var x = zeros( 4, 'complex128' );
// Get a list of array data types:
var dt = dtypes();
// Generate filled arrays...
var y;
var i;
for ( i = 0; i < dt.length; i++ ) {
y = fullLike( x, 1.0, dt[ i ] );
console.log( y );
}
`
*
- [@stdlib/array-full][@stdlib/array/full]: create a filled array having a specified length.
- [@stdlib/array-ones-like][@stdlib/array/ones-like]: create an array filled with ones and having the same length and data type as a provided array.
- [@stdlib/array-zeros-like][@stdlib/array/zeros-like]: create a zero-filled array having the same length and data type as a provided array.
*
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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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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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-full-like/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-full-like/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-full-like/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-full-like/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-full-like/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-full-like/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-full-like/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-full-like/main/LICENSE
[@stdlib/array/dtypes]: https://www.npmjs.com/package/@stdlib/array-dtypes
[@stdlib/array/full]: https://www.npmjs.com/package/@stdlib/array-full
[@stdlib/array/ones-like]: https://www.npmjs.com/package/@stdlib/array-ones-like
[@stdlib/array/zeros-like]: https://www.npmjs.com/package/@stdlib/array-zeros-like