cueveryByRight

Cumulatively test whether every array element in a provided array passes a test implemented by a predicate function, while iterating from right-to-left.

Installation

npm install @stdlib/array-base-cuevery-by-right

Usage

var cueveryByRight = require( '@stdlib/array-base-cuevery-by-right' );

cueveryByRight( x, predicate[, thisArg ] )

Cumulatively tests whether every array element in a provided array passes a test implemented by a predicate function, while iterating from right-to-left.

function fcn( value ) {
    return value > 0;
}

var x = [ 0, 0, 1, 1, 1 ];

var y = cueveryByRight( x, fcn );
// returns [ true, true, true, false, false ];

cueveryByRight.assign( x, out, stride, offset, predicate[, thisArg ] )

Cumulatively tests whether every array element in a provided array passes a test implemented by a predicate function, while iterating from right-to-left, and assigns the results to the elements in the output array.

function fcn( v ) {
    return v > 0;
}

var x = [ 0, 0, 1, 1, 1 ];
var y = [ false, null, false, null, false, null, false, null, false, null ];

var out = cueveryByRight.assign( x, y, 2, 0, fcn );
// returns [ true, null, true, null, true, null, false, null, false, null ]

var bool = ( out === y );
// returns true

The invoked predicate function is provided three arguments:

• value: collection element.
• index: collection index.
• collection: input collection.

To set the function execution context, provide a thisArg.

function fcn( v ) {
    this.count += 1;
    return ( v > 0 );
}

var x = [ 0, 0, 1, 1, 1 ];

var context = {
    'count': 0
};

var bool = cueveryByRight( x, fcn, context );
// returns [ true, true, true, false, false ]

var count = context.count;
// returns 4

Examples

var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var cueveryByRight = require( '@stdlib/array-base-cuevery-by-right' );

function isPositive( value ) {
    return ( value > 0 );
}

// Create an array of random values:
var x = discreteUniform( 10, -10, 10 );
console.log( x );

// Cumulatively test whether every array element passes a test, while iterating from right-to-left:
var out = cueveryByRight( x, isPositive );
console.log( out );

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.