52 lines
1.2 KiB
JavaScript
52 lines
1.2 KiB
JavaScript
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow strict
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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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const matricesDiffer = function (
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one: ?Array<number>,
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two: ?Array<number>,
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): boolean {
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if (one === two) {
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return false;
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}
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return (
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!one ||
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!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[0] !== two[0] ||
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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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};
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module.exports = matricesDiffer;
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