From ebcebd04def11fb346fac5367767e7360fc1d010 Mon Sep 17 00:00:00 2001
From: denis <denis@dunamu.com>
Date: Tue, 12 Nov 2019 14:34:52 +0900
Subject: [PATCH 1/3] =?UTF-8?q?-=201=EC=B0=A8=20=EC=99=84=EB=A3=8C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Tutorial/Tutorial.playground/Contents.swift | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/Tutorial/Tutorial.playground/Contents.swift b/Tutorial/Tutorial.playground/Contents.swift
index 9b0d9f6..b6e1e3d 100644
--- a/Tutorial/Tutorial.playground/Contents.swift
+++ b/Tutorial/Tutorial.playground/Contents.swift
@@ -24,9 +24,20 @@ let selectedIndexesFilePath = Bundle.main.path(forResource: "selectedIndexes", o
 let champsData = FileManager.default.contents(atPath: champsFilePath!)
 let selectedIndexesData = FileManager.default.contents(atPath: selectedIndexesFilePath!)
 
-let champs = try JSONSerialization.jsonObject(with: champsData!, options: [])
-let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])
+let champs = try JSONSerialization.jsonObject(with: champsData!, options: []) as! [[String : Any]]
+let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])  as! [Int]
 
-// TODO: selectedIndexes는 챔피언 목록(champs)의 key 번호 들이다. selectedIndexes에 명시된 순서대로 챔피언들의 이름(name)을 나열하라
-let names: [String] = []
-print(names)
+//// TODO: selectedIndexes는 챔피언 목록(champs)의 key 번호 들이다. selectedIndexes에 명시된 순서대로 챔피언들의 이름(name)을 나열하라
+//champs.filter {
+//    let key = $0["key"]
+//
+//    return true
+//}
+champs.filter {
+    let keyNumer = Int($0["key"] as! String)
+    let selectedIndexList = selectedIndexes.filter { return $0 == keyNumer }
+    return selectedIndexList.count > 0 && keyNumer == selectedIndexList[0]
+}
+.forEach {
+    print($0["name"]!)
+}

From 85ec27f9c78623d5b8c01a90228d991812b92a16 Mon Sep 17 00:00:00 2001
From: denis <denis@dunamu.com>
Date: Tue, 12 Nov 2019 14:39:12 +0900
Subject: [PATCH 2/3] =?UTF-8?q?2=EB=B2=88=EC=A7=B8=20=EB=B0=A9=EB=B2=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Tutorial/Tutorial.playground/Contents.swift | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/Tutorial/Tutorial.playground/Contents.swift b/Tutorial/Tutorial.playground/Contents.swift
index b6e1e3d..c85f1e4 100644
--- a/Tutorial/Tutorial.playground/Contents.swift
+++ b/Tutorial/Tutorial.playground/Contents.swift
@@ -28,11 +28,7 @@ let champs = try JSONSerialization.jsonObject(with: champsData!, options: []) as
 let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])  as! [Int]
 
 //// TODO: selectedIndexes는 챔피언 목록(champs)의 key 번호 들이다. selectedIndexes에 명시된 순서대로 챔피언들의 이름(name)을 나열하라
-//champs.filter {
-//    let key = $0["key"]
-//
-//    return true
-//}
+/// 1번쨰 방법
 champs.filter {
     let keyNumer = Int($0["key"] as! String)
     let selectedIndexList = selectedIndexes.filter { return $0 == keyNumer }
@@ -41,3 +37,14 @@ champs.filter {
 .forEach {
     print($0["name"]!)
 }
+    
+/// 2번쨰 방법
+selectedIndexes.forEach {
+    let index = "\($0)"
+    champs.filter {
+        return index == $0["key"] as! String
+    }
+    .forEach {
+        print($0["name"]!)
+    }
+}

From 7613199550a8abb22e60b18df50231820de842e4 Mon Sep 17 00:00:00 2001
From: denis <denis@dunamu.com>
Date: Tue, 12 Nov 2019 14:48:06 +0900
Subject: [PATCH 3/3] =?UTF-8?q?=EB=B0=A9=EC=96=B4=20=EC=BD=94=EB=93=9C=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Tutorial/Tutorial.playground/Contents.swift | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/Tutorial/Tutorial.playground/Contents.swift b/Tutorial/Tutorial.playground/Contents.swift
index c85f1e4..d59f304 100644
--- a/Tutorial/Tutorial.playground/Contents.swift
+++ b/Tutorial/Tutorial.playground/Contents.swift
@@ -24,24 +24,27 @@ let selectedIndexesFilePath = Bundle.main.path(forResource: "selectedIndexes", o
 let champsData = FileManager.default.contents(atPath: champsFilePath!)
 let selectedIndexesData = FileManager.default.contents(atPath: selectedIndexesFilePath!)
 
-let champs = try JSONSerialization.jsonObject(with: champsData!, options: []) as! [[String : Any]]
-let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])  as! [Int]
+let champs = try JSONSerialization.jsonObject(with: champsData!, options: []) as? [[String : Any]]
+let selectedIndexes = try JSONSerialization.jsonObject(with: selectedIndexesData!, options: [])  as? [Int]
 
 //// TODO: selectedIndexes는 챔피언 목록(champs)의 key 번호 들이다. selectedIndexes에 명시된 순서대로 챔피언들의 이름(name)을 나열하라
 /// 1번쨰 방법
-champs.filter {
+champs?.filter {
     let keyNumer = Int($0["key"] as! String)
-    let selectedIndexList = selectedIndexes.filter { return $0 == keyNumer }
-    return selectedIndexList.count > 0 && keyNumer == selectedIndexList[0]
+    guard let _selectedIndexList = selectedIndexes?.filter({ return $0 == keyNumer }),
+        _selectedIndexList.count > 0 else {
+        return false
+    }
+    return keyNumer == _selectedIndexList[0]
 }
 .forEach {
     print($0["name"]!)
 }
     
 /// 2번쨰 방법
-selectedIndexes.forEach {
+selectedIndexes?.forEach {
     let index = "\($0)"
-    champs.filter {
+    champs?.filter {
         return index == $0["key"] as! String
     }
     .forEach {