Merge pull request #856 from Jerry-306/patch-42

简化 1002 查找相同字符 JavaScript版本代码

problems/1002.查找常用字符.md

@@ -224,10 +224,7 @@ javaScript
 var commonChars = function (words) {
 	let res = []
 	let size = 26
-	let firstHash = new Array(size)
+	let firstHash = new Array(size).fill(0)   // 初始化 hash 数组
-	for (let i = 0; i < size; i++) { // 初始化 hash 数组
-		firstHash[i] = 0
-	}
 
 	let a = "a".charCodeAt()
 	let firstWord = words[0]
@@ -236,20 +233,19 @@ var commonChars = function (words) {
 		firstHash[idx - a] += 1
 	}
 	
+	let otherHash = new Array(size).fill(0)    // 初始化 hash 数组
 	for (let i = 1; i < words.length; i++) { // 1-n 个单词统计
-		let otherHash = new Array(size)
-		for (let i = 0; i < size; i++) { // 初始化 hash 数组
-			otherHash[i] = 0
-		}
-
 		for (let j = 0; j < words[i].length; j++) {
 			let idx = words[i][j].charCodeAt()
 			otherHash[idx - a] += 1
 		}
+		
 		for (let i = 0; i < size; i++) {
 			firstHash[i] = Math.min(firstHash[i], otherHash[i])
 		}
+		otherHash.fill(0)
 	}
+	
 	for (let i = 0; i < size; i++) {
 		while (firstHash[i] > 0) {
 			res.push(String.fromCharCode(i + a))