From 07e8abeccb423bf5501da54b6fd9dc89aaa703ee Mon Sep 17 00:00:00 2001
From: "qingyi.liu" <qingyival@163.com>
Date: Wed, 26 May 2021 17:49:06 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0150.=20=E9=80=86=E6=B3=A2?=
 =?UTF-8?q?=E5=85=B0=E8=A1=A8=E8=BE=BE=E5=BC=8F=E6=B1=82=E5=80=BCjavaScrip?=
 =?UTF-8?q?t=E7=89=88=E6=9C=AC?=
MIME-Version: 1.0
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---
 problems/0150.逆波兰表达式求值.md | 26 +++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/problems/0150.逆波兰表达式求值.md b/problems/0150.逆波兰表达式求值.md
index 618a6830..e38bc1a3 100644
--- a/problems/0150.逆波兰表达式求值.md
+++ b/problems/0150.逆波兰表达式求值.md
@@ -197,6 +197,32 @@ func evalRPN(tokens []string) int {
 }
 ```
 
+javaScript:
+
+```js
+
+/**
+ * @param {string[]} tokens
+ * @return {number}
+ */
+var evalRPN = function(tokens) {
+    const s = new Map([
+        ["+", (a, b) => a * 1  + b * 1],
+        ["-", (a, b) => b - a],
+        ["*", (a, b) => b * a],
+        ["/", (a, b) => (b / a) | 0]
+    ]);
+    const stack = [];
+    for (const i of tokens) {
+        if(!s.has(i)) {
+            stack.push(i);
+            continue;
+        }
+        stack.push(s.get(i)(stack.pop(),stack.pop()))
+    }
+    return stack.pop();
+};
+```
 
 
 -----------------------