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Array-Like Function

Return a function which tests if every element in an array-like object passes a test condition.

Installation

npm install @stdlib/assert-tools-array-like-function

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

vararraylikefcn=require('@stdlib/assert-tools-array-like-function');

arraylikefcn( predicate )

Returns a function which tests if every element in an array-like object passes a test condition. Given an input array-like object, the function returns true if all elements pass the test and false otherwise.

varisOdd=require('@stdlib/assert-is-odd');vararr1=[1,3,5,7];vararr2=[3,5,8];varf=arraylikefcn(isOdd);varbool=f(arr1);// returns truebool=f(arr2);// returns false

Notes

• The returned function will return false if not provided an array-like object.
• The returned function will return false if provided an empty array-like object.
• A predicate function should accept a single argument: an element from an array-like object. If the element satisfies a test condition, the predicate function should return true; otherwise, the predicate function should return false.

Examples

varisEven=require('@stdlib/assert-is-even');vararraylikefcn=require('@stdlib/assert-tools-array-like-function');vararr1;vararr2;varbool;varf;vari;arr1=newArray(25);for(i=0;i<arr1.length;i++){arr1[i]=i;}arr2=newArray(25);for(i=0;i<arr2.length;i++){arr2[i]=2*i;}f=arraylikefcn(isEven);bool=f(arr1);// returns falsebool=f(arr2);// returns true

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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 © 2016-2026. The Stdlib Authors.