About stdlib...
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.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
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Return a shallow copy of a portion of an array.
npm install @stdlib/array-sliceAlternatively,
- To load the package in a website via a
scripttag without installation and bundlers, use the ES Module available on theesmbranch (see README). - If you are using Deno, visit the
denobranch (see README for usage intructions). - For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the
umdbranch (see README).
The branches.md 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.
var slice = require( '@stdlib/array-slice' );Returns a shallow copy of a portion of an array.
var x = [ 1, 2, 3, 4, 5, 6 ];
var out = slice( x );
// returns [ 1, 2, 3, 4, 5, 6 ]
var bool = ( out === x );
// returns falseThe function accepts the following arguments:
- x: input array.
- start: starting index (inclusive). Default:
0. - end: ending index (exclusive). Default:
x.length.
By default, the function returns a shallow copy beginning from the first element of the provided input array. To begin copying from an alternative element, provide a starting index (inclusive).
var x = [ 1, 2, 3, 4, 5, 6 ];
var out = slice( x, 2 );
// returns [ 3, 4, 5, 6 ]By default, the function copies through the end of the provided input array. To copy up until a specific element, provide an ending index (exclusive).
var x = [ 1, 2, 3, 4, 5, 6 ];
var out = slice( x, 1, 4 );
// returns [ 2, 3, 4 ]-
If provided an array-like object having a
slicemethod, the function defers execution to that method and assumes that the method API has the following signature:x.slice( start, end ) -
If provided an array-like object without a
slicemethod, the function copies input array elements to a new generic array.
var Float64Array = require( '@stdlib/array-float64' );
var zeroTo = require( '@stdlib/array-zero-to' );
var slice = require( '@stdlib/array-slice' );
var x = zeroTo( 6, 'float64' );
// returns <Float64Array>[ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ]
var s = slice( x );
// returns <Float64Array>[ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ]
s = slice( x, 0, 4 );
// returns <Float64Array>[ 0.0, 1.0, 2.0, 3.0 ]
s = slice( x, 2 );
// returns <Float64Array>[ 2.0, 3.0, 4.0, 5.0 ]
s = slice( x, 2, 4 );
// returns <Float64Array>[ 2.0, 3.0 ]@stdlib/array-take: take elements from an array.
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.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.