From 94bf8916eef21cd40b2eb7b04cf67b2bf32ed6f6 Mon Sep 17 00:00:00 2001
From: Aaron-Lin-74 <84072071+Aaron-Lin-74@users.noreply.github.com>
Date: Mon, 7 Mar 2022 10:15:06 +1100
Subject: [PATCH] =?UTF-8?q?Update=201002.=E6=9F=A5=E6=89=BE=E5=B8=B8?=
 =?UTF-8?q?=E7=94=A8=E5=AD=97=E7=AC=A6.md?=
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Add TypeScript solution.
---
 problems/1002.查找常用字符.md | 35 +++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/problems/1002.查找常用字符.md b/problems/1002.查找常用字符.md
index 7c5566d3..efad1e6a 100644
--- a/problems/1002.查找常用字符.md
+++ b/problems/1002.查找常用字符.md
@@ -253,6 +253,41 @@ var commonChars = function (words) {
 	return res
 };
 ```
+
+TypeScript
+```ts
+function commonChars(words: string[]): string[] {
+  let result: string[] = [];
+  if (words.length === 0) return result;
+  const size: number = 26;
+  const hash: number[] = new Array(size).fill(0);
+  const otherHash: number[] = new Array(size).fill(0);
+  let pivot: number = 'a'.charCodeAt(0);
+  // First word
+  for (let character of words[0]) {
+    hash[character.charCodeAt(0) - pivot]++;
+  }
+  // Other words
+  for (let i = 1; i < words.length; i++) {
+    for (let character of words[i]) {
+      otherHash[character.charCodeAt(0) - pivot]++;
+    }
+    // Update the first hash with min
+    for (let j = 0; j < size; j++) {
+      hash[j] = Math.min(hash[j], otherHash[j]);
+    }
+    // Reset otherHash
+    otherHash.fill(0);
+  }
+  // Construct the result
+  hash.forEach((element, index) => {
+    while (element-- > 0) {
+      result.push(String.fromCharCode(index + pivot));
+    }
+  });
+  return result;
+}
+```
 GO
 ```golang
 func commonChars(words []string) []string {