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* @license Apache-2.0
*
* Copyright (c) 2024 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 isComplex128Array = require( '@stdlib/array/base/assert/is-complex128array' );
var isComplex64Array = require( '@stdlib/array/base/assert/is-complex64array' );
var isBooleanArray = require( '@stdlib/array/base/assert/is-booleanarray' );
var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
var reinterpret128 = require( '@stdlib/strided/base/reinterpret-complex128' );
var reinterpret64 = require( '@stdlib/strided/base/reinterpret-complex64' );
var reinterpretBoolean = require( '@stdlib/strided/base/reinterpret-boolean' );
// FUNCTIONS //
/**
* Tests whether all elements in an array are falsy.
*
* @private
* @param {Collection} x - input array
* @returns {boolean} boolean indicating whether all elements are falsy
*
* @example
* var x = [ 0, 0, 0, 0 ];
*
* var out = internal( x );
* // returns true
*
* @example
* var x = [ 1, 2, 0, 4 ];
*
* var out = internal( x );
* // returns false
*/
function internal( x ) {
var i;
for ( i = 0; i < x.length; i++ ) {
if ( x[ i ] ) {
return false;
}
}
return true;
}
/**
* Tests whether all elements in an array are falsy.
*
* @private
* @param {Object} x - input array object
* @returns {boolean} boolean indicating whether all elements are falsy
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
*
* var x = arraylike2object( toAccessorArray( [ 0, 0, 0, 0 ] ) );
*
* var out = accessors( x );
* // returns true
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
*
* var x = arraylike2object( toAccessorArray( [ 1, 2, 0, 4 ] ) );
*
* var out = accessors( x );
* // returns false
*/
function accessors( x ) {
var data;
var get;
var i;
data = x.data;
get = x.accessors[ 0 ];
for ( i = 0; i < data.length; i++ ) {
if ( get( data, i ) ) {
return false;
}
}
return true;
}
// MAIN //
/**
* Tests whether all elements in an array are falsy.
*
* @param {Collection} x - input array
* @returns {boolean} boolean indicating whether all elements are falsy
*
* @example
* var x = [ 0, 0, 0, 0 ];
*
* var out = none( x );
* // returns true
*
* @example
* var x = [ 1, 2, 0, 4 ];
*
* var out = none( x );
* // returns false
*/
function none( x ) {
var obj = arraylike2object( x );
if ( obj.accessorProtocol ) {
// If provided a complex number array, reinterpret as a real typed array and test interleaved real and imaginary components, where we consider a complex number to be falsy if both components are zero...
if ( isComplex128Array( x ) ) {
return internal( reinterpret128( x, 0 ) );
}
if ( isComplex64Array( x ) ) {
return internal( reinterpret64( x, 0 ) );
}
// If provided a boolean array, reinterpret as a typed array and test whether all elements are false...
if ( isBooleanArray( x ) ) {
return internal( reinterpretBoolean( x, 0 ) );
}
return accessors( obj );
}
return internal( x );
}
// EXPORTS //
module.exports = none;
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