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Test whether all elements in a collection are falsy.
import none from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-none@esm/index.mjs';Tests whether all elements in a collection are falsy.
var arr = [ 0, 0, 0, 0, 0 ];
var bool = none( arr );
// returns trueIf provided an empty collection, the function returns true.
var bool = none( [] );
// returns true- A
collectionmay be either anArray,Typed Array, or an array-likeObject(excludingstringsandfunctions). - The function does not skip
undefinedelements and is thus not optimized for sparse collections.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">
import randu from 'https://cdn.jsdelivr.net/gh/stdlib-js/random-base-randu@esm/index.mjs';
import none from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-none@esm/index.mjs';
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>
</script>
</body>
</html>@stdlib/utils-any: test whether at least one element in a collection is truthy.@stdlib/utils-every: test whether all elements in a collection are truthy.@stdlib/utils-for-each: invoke a function for each element in a collection.@stdlib/utils-none-by: test whether all elements in a collection fail a test implemented by a predicate function.@stdlib/utils-some: test whether a collection contains at leastnelements which are truthy.
This package is part of stdlib, a standard library 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.
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See LICENSE.
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