@stdlib/utils-some NPM

some

Test whether a collection contains at least n elements which are truthy.

Installation

npm install @stdlib/utils-some

Usage

var some = require( '@stdlib/utils-some' );

some( collection, n )

Tests whether a collection contains at least n elements which are truthy.

var arr = [ 0, 0, 1, 2, 3 ];

var bool = some( arr, 3 );
// returns true

If provided an empty collection, the function returns false.

var bool = some( [], 1 );
// returns false

Notes

A collection may be either an Array, Typed Array, or an array-like Object (excluding strings and functions).
The function does not skip undefined elements and is thus not optimized for sparse collections.

Examples

var randu = require( '@stdlib/random-base-randu' );
var some = require( '@stdlib/utils-some' );

var bool;
var arr;
var i;

arr = new Array( 100 );
for ( i = 0; i < arr.length; i++ ) {
    arr[ i ] = ( randu() > 0.95 );
}

bool = some( arr, 5 );
// returns <boolean>

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.