53 lines
1.1 KiB
JavaScript
53 lines
1.1 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MAIN //
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/**
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* Returns the number of elements in an array.
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*
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* @param {(NonNegativeIntegerArray|EmptyArray)} shape - array shape
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* @returns {NonNegativeInteger} number of elements
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*
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* @example
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* var n = numel( [ 3, 3, 3 ] );
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* // returns 27
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*/
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function numel( shape ) {
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var ndims;
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var n;
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var i;
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ndims = shape.length;
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if ( ndims === 0 ) {
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return 0;
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}
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n = 1;
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for ( i = 0; i < ndims; i++ ) {
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n *= shape[ i ];
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}
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return n;
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}
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// EXPORTS //
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module.exports = numel;
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