none

    Test whether all elements in a collection are falsy.

    Usage

    var none = require( '@stdlib/utils/none' );
    

    none( collection )

    Tests whether all elements in a collection are falsy.

    var arr = [ 0, 0, 0, 0, 0 ];
    
    var bool = none( arr );
    // returns true
    

    If provided an empty collection, the function returns true.

    var bool = none( [] );
    // returns true
    

    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 none = require( '@stdlib/utils/none' );
    
    var bool;
    var arr;
    var i;
    
    arr = new Array( 100 );
    for ( i = 0; i < arr.length; i++ ) {
        arr[ i ] = ( randu() > 0.95 );
    }
    
    bool = none( arr );
    // returns <boolean>