45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule matricesDiffer
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*/
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'use strict';
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/**
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* Unrolls an array comparison specially for matrices. Prioritizes
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* checking of indices that are most likely to change so that the comparison
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* bails as early as possible.
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*
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* @param {MatrixMath.Matrix} one First matrix.
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* @param {MatrixMath.Matrix} two Second matrix.
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* @return {boolean} Whether or not the two matrices differ.
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*/
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var matricesDiffer = function(one, two) {
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if (one === two) {
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return false;
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}
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return !one || !two ||
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one[12] !== two[12] ||
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one[13] !== two[13] ||
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one[14] !== two[14] ||
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one[5] !== two[5] ||
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one[10] !== two[10] ||
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one[1] !== two[1] ||
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one[2] !== two[2] ||
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one[3] !== two[3] ||
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one[4] !== two[4] ||
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one[6] !== two[6] ||
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one[7] !== two[7] ||
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one[8] !== two[8] ||
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one[9] !== two[9] ||
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one[11] !== two[11] ||
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one[15] !== two[15];
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};
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module.exports = matricesDiffer;
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