solved: 프로그래머스 #42888

Author: chaentopia

coding_test_practice/240702_42888.swift

@@ -0,0 +1,41 @@
+//
+//  240702_42888.swift
+//
+//
+//  Created by 정채은 on 7/2/24.
+//
+
+import Foundation
+
+func solution(_ record:[String]) -> [String] {
+    let enter = "님이 들어왔습니다."
+    let leave = "님이 나갔습니다."
+    var member = [String : String]()
+    var arr: [[String]] = []
+    var result: [String] = []
+    
+    record.forEach {
+        let text = $0.components(separatedBy: " ")
+        switch text[0] {
+            case "Enter":
+            arr.append([text[1], enter])
+            member[text[1]] = text[2]
+            case "Leave":
+            arr.append([text[1], leave])
+            case "Change":
+            member[text[1]] = text[2]
+            default:
+               return
+        }
+    }
+    
+    arr.forEach {
+        if let name = member[$0[0]] {
+            result.append(name + $0[1])
+        } else {
+            return
+        }
+    }
+    
+    return result
+}