time-to-botec/squiggle/node_modules/@stdlib/utils/none/lib/main.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

60 lines
1.4 KiB
JavaScript

/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var isCollection = require( '@stdlib/assert/is-collection' );
// MAIN //
/**
* Tests whether all elements in a collection are falsy.
*
* @param {Collection} collection - input collection
* @throws {TypeError} must provide a collection
* @returns {boolean} boolean indicating whether all elements are falsy
*
* @example
* var arr = [ 0, 0, 0, 0, 0 ];
*
* var bool = none( arr );
* // returns true
*/
function none( collection ) {
var len;
var i;
if ( !isCollection( collection ) ) {
throw new TypeError( 'invalid argument. Must provide a collection. Value: `'+collection+'`.' );
}
len = collection.length;
for ( i = 0; i < len; i++ ) {
if ( collection[ i ] ) {
return false;
}
}
return true;
}
// EXPORTS //
module.exports = none;