81차 3번 문제풀이

Author: eric-hjh

live8/test81/문제3/황장현.js

@@ -0,0 +1,38 @@
+function solution(record) {
+  const userInfo = {};
+  const action = [];
+  const stateMapping = {
+    Enter: '님이 들어왔습니다.',
+    Leave: '님이 나갔습니다.',
+  };
+
+  record.forEach((v) => {
+    const [state, id, nick] = v.split(' ');
+
+    if (state !== 'Change') {
+      action.push([state, id]);
+    }
+
+    if (nick) {
+      userInfo[id] = nick;
+    }
+  });
+  console.log(userInfo);
+
+  return action.map(([state, uid]) => {
+    return `${userInfo[uid]}${stateMapping[state]}`;
+  });
+}
+console.log(
+  solution([
+    'Enter uid1234 Muzi',
+    'Enter uid4567 Prodo',
+    'Leave uid1234',
+    'Enter uid1234 Prodo',
+    'Change uid4567 Ryan',
+  ])
+);
+
+const obj = {};
+obj['asdf'] = '1';
+console.log(obj.asdf);