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/**
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* File: stack.js
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* Created Time: 2022-12-04
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* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
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*/
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/* 初始化栈 */
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// Javascript 没有内置的栈类,可以把 Array 当作栈来使用
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const stack = [];
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/* 元素入栈 */
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stack.push(1);
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stack.push(3);
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stack.push(2);
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stack.push(5);
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stack.push(4);
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/* 访问栈顶元素 */
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peek = stack[stack.length - 1];
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/* 元素出栈 */
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pop = stack.pop();
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/* 获取栈的长度 */
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size = stack.length;
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/* 判断是否为空 */
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is_empty = stack.length === 0;
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