27 lines
702 B
JavaScript
27 lines
702 B
JavaScript
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// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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Array.prototype.getStaggeredFromMiddle = function(i) {
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if (i >= this.length) {
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throw("getStaggeredFromMiddle: OOB");
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}
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var middle = Math.floor(this.length / 2);
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var index = middle + (((i % 2) == 0) ? (i / 2) : (((1 - i) / 2) - 1));
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return this[index];
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}
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Array.prototype.contains = function(obj) {
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var i = this.length;
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while (i--) {
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if (this[i] === obj) {
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return true;
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}
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}
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return false;
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}
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Math.alignUp = function(raw, multiple) {
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return Math.floor((raw + multiple - 1) / multiple) * multiple;
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}
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