1002查找常用字符添加typescript

problems/1002.查找常用字符.md

@@ -253,6 +253,41 @@ var commonChars = function (words) {
 	return res
 };
 ```
+TypeScript
+```ts
+  console.time("test")
+  let str: string = ""
+  //设置一个用字母组成的map字典
+  let map = new Map<string, number>()
+  //给所有map设置初始值为0
+  let wordInitial: [string, number][] = words[0]
+    .split("")
+    .map((item) => [item, 0])
+  //如果有重复字母,就把重复字母的数量加1
+  for (let word of words[0]) {
+    map.set(word, map.has(word) ? map.get(word) + 1 : 1)
+  }
+  for (let i = 1; i < words.length; i++) {
+    const mapWord = new Map<string, number>(wordInitial)
+    for (let j = 0; j < words[i].length; j++) {
+      if (!map.has(words[i][j])) continue
+      //mapWord中的字母的个数不能高于当前map的个数,多于则不能添加
+      if (map.get(words[i][j]) > mapWord.get(words[i][j])) {
+        mapWord.set(
+          words[i][j],
+          mapWord.has(words[i][j]) ? mapWord!.get(words[i][j]) + 1 : 1
+        )
+      }
+    }
+    //每次重新初始化map
+    map = mapWord
+  }
+  for (let [key, value] of map) {
+    str += key.repeat(value)
+  }
+  console.timeEnd("test")
+  return str.split("")
+```
 GO
 ```golang
 func commonChars(words []string) []string {