@stdlib/assert-tools-array-function

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Array Function

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

Installation

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

Usage

var arrayfcn = require( '@stdlib/assert-tools-array-function' );

arrayfcn( predicate )

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

var isOdd = require( '@stdlib/assert-is-odd' );

var arr1 = [ 1, 3, 5, 7 ];
var arr2 = [ 3, 5, 8 ];

var f = arrayfcn( isOdd );

var bool = f( arr1 );
// returns true

bool = f( arr2 );
// returns false

Notes

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

Examples

var isEven = require( '@stdlib/assert-is-even' );
var arrayfcn = require( '@stdlib/assert-tools-array-function' );

var arr1;
var arr2;
var bool;
var f;
var i;

arr1 = new Array( 25 );
for ( i = 0; i < arr1.length; i++ ) {
    arr1[ i ] = i;
}

arr2 = new Array( 25 );
for ( i = 0; i < arr2.length; i++ ) {
    arr2[ i ] = 2 * i;
}

f = arrayfcn( isEven );

bool = f( arr1 );
// returns false

bool = f( arr2 );
// returns true

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

License

See LICENSE.

Copyright

Copyright © 2016-2026. The Stdlib Authors.