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join

Return a string created by joining array elements using a specified separator.

Installation

npm install @stdlib/array-base-join

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (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.

Usage

var join = require( '@stdlib/array-base-join' );

join( x, separator )

Returns a string created by joining array elements using a specified separator.

var x = [ 1, 2, 3, 4, 5, 6 ];

var out = join( x, ',' );
// returns '1,2,3,4,5,6'

Notes

• If provided an array-like object having a join method, the function defers execution to that method and assumes that the method API has the following signature:

  x.join( separator )
  

• If provided an array-like object without a join method, the function manually constructs the output string.

• If an array element is either null or undefined, the function will serialize the element as an empty string.

Examples

var Complex128Array = require( '@stdlib/array-complex128' );
var Complex64Array = require( '@stdlib/array-complex64' );
var AccessorArray = require( '@stdlib/array-base-accessor' );
var Float64Array = require( '@stdlib/array-float64' );
var join = require( '@stdlib/array-base-join' );

var x = [ 0, 1, 2, 3, 4, 5 ];
var s = join( x, ',' );
// returns '0,1,2,3,4,5'

x = new Float64Array( [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ] );
s = join( x, ',' );
// returns '0,1,2,3,4,5'

s = join( x, '-' );
// returns '0-1-2-3-4-5'

x = new AccessorArray( [ 1, 2, 3, 4 ] );
s = join( x, ',' );
// returns '1,2,3,4'

x = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
s = join( x, ',' );
// returns '1 + 2i,3 + 4i,5 + 6i'

x = new Complex64Array( [ 1.0, -1.0, 2.0, -2.0 ] );
s = join( x, ',' );
// returns '1 - 1i,2 - 2i'

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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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2025. The Stdlib Authors.