@stdlib/array-base-filled-by NPM

filledBy

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

Installation

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

Usage

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

filledBy( len, clbk[, thisArg] )

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

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.

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

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, 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, see the main project repository.