From 27d3b489e32db12655cb8fed036c904f42f99efd Mon Sep 17 00:00:00 2001
From: LouisFonda <yigencong@yahoo.com>
Date: Fri, 7 Mar 2025 20:24:37 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=B7=BB=E5=8A=A0=E6=A0=88=E6=95=B0?=
 =?UTF-8?q?=E6=8D=AE=E7=BB=93=E6=9E=84?=
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---
 stack/index.js | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 stack/index.js

diff --git a/stack/index.js b/stack/index.js
new file mode 100644
index 0000000..110b5d0
--- /dev/null
+++ b/stack/index.js
@@ -0,0 +1,50 @@
+class Stack {
+  constructor(items = []) {
+    this.items = items; // 用 items 来存储栈的元素
+  }
+
+  // 入栈
+  push(item) {
+    this.items.push(item);
+  }
+
+  // 出栈
+  pop() {
+    if (this.isEmpty()) {
+      console.log('栈为空！ ');
+      return undefined; // 栈为空时返回 undefined
+    }
+    return this.items.pop();
+  }
+
+  // 获取栈顶元素
+  peek() {
+    if (this.isEmpty()) {
+      console.log('栈为空！ ');
+      return undefined; // 栈为空时返回 undefined
+    }
+    return this.items[this.items.length - 1];
+  }
+
+  // 判断栈是否为空
+  isEmpty() {
+    return this.items.length === 0;
+  }
+
+  // 获取栈的大小
+  size() {
+    return this.items.length;
+  }
+
+  // 清空栈
+  clear() {
+    this.items = [];
+  }
+
+  // 打印栈内容
+  print() {
+    console.log(this.items.toString());
+  }
+}
+
+export default Stack;