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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';The previous example will load the latest bundled code from the esm branch. Alternatively, you may load a specific version by loading the file from one of the tagged bundles. For example,
import none from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-none@v0.2.2-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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
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