Open chat / 심화

Author: bona1122

bona1122/[week4]Hash/Open_chat.js

@@ -0,0 +1,18 @@
+function solution(record) {
+  const userInfo = {}
+  const result = []
+  const MESSAGES = {
+    Enter: "님이 들어왔습니다.",
+    Leave: "님이 나갔습니다.",
+  }
+
+  record.forEach((r) => {
+    const [action, id, name] = r.split(" ")
+    if (name) userInfo[id] = name
+    if (action !== "Change") {
+      result.push([id, MESSAGES[action]])
+    }
+  })
+
+  return result.map(([id, message]) => userInfo[id] + message)
+}