修改版本一、增加版本二 0739.每日温度 javascript 版本

Author: Jamcy123

problems/0739.每日温度.md

@@ -301,32 +301,46 @@ func dailyTemperatures(num []int) []int {
 
 JavaScript：
 ```javascript
-/**
- * @param {number[]} temperatures
- * @return {number[]}
- */
+// 版本一
 var dailyTemperatures = function(temperatures) {
-    let n = temperatures.length;
-    let res = new Array(n).fill(0);
-    let stack = [];  // 递减栈：用于存储元素右面第一个比他大的元素下标
+    const n = temperatures.length;
+    const res = Array(n).fill(0);
+    const stack = [];  // 递增栈：用于存储元素右面第一个比他大的元素下标
     stack.push(0);
     for (let i = 1; i < n; i++) {
         // 栈顶元素
-        let top = stack[stack.length - 1];
+        const top = stack[stack.length - 1];
         if (temperatures[i] < temperatures[top]) {
             stack.push(i);
         } else if (temperatures[i] === temperatures[top]) {
             stack.push(i);
         } else {
             while (stack.length && temperatures[i] > temperatures[stack[stack.length - 1]]) {
-                let top = stack.pop();
+                const top = stack.pop();
                 res[top] = i - top;
             }
             stack.push(i);
         }
     }
     return res;
 };
+
+
+// 版本二
+var dailyTemperatures = function(temperatures) {
+    const n = temperatures.length;
+    const res = Array(n).fill(0);
+    const stack = [];  // 递增栈：用于存储元素右面第一个比他大的元素下标
+    stack.push(0);
+    for (let i = 1; i < n; i++) {
+        while (stack.length && temperatures[i] > temperatures[stack[stack.length - 1]]) {
+            const top = stack.pop();
+            res[top] = i - top;
+        }
+        stack.push(i);
+    }
+    return res;
+};
 ```