From 02f98de3220d0086ca11c9cd89761856e2563d49 Mon Sep 17 00:00:00 2001
From: ostrichb <ostrichb@outlook.com>
Date: Sat, 12 Nov 2022 03:23:56 +0000
Subject: [PATCH] initial

---
 .gitignore                                    |  26 +++++++
 Task1_practice.playground/Contents.swift      |  26 +++++++
 .../contents.xcplayground                     |   4 ++
 .../contents.xcworkspacedata                  |   7 ++
 .../UserInterfaceState.xcuserstate            | Bin 0 -> 16927 bytes
 Task1_practice.playground/timeline.xctimeline |  10 +++
 Task2_pracitce.playground/Contents.swift      |  22 ++++++
 .../contents.xcplayground                     |   4 ++
 .../contents.xcworkspacedata                  |   7 ++
 .../UserInterfaceState.xcuserstate            | Bin 0 -> 16331 bytes
 Task2_pracitce.playground/timeline.xctimeline |  10 +++
 .../xcschemes/xcschememanagement.plist        |  16 +++++
 Task3_practice.playground/Contents.swift      |  14 ++++
 .../contents.xcplayground                     |   4 ++
 .../contents.xcworkspacedata                  |   7 ++
 .../UserInterfaceState.xcuserstate            | Bin 0 -> 15588 bytes
 Task3_practice.playground/timeline.xctimeline |  26 +++++++
 Task4_practice.playground/Contents.swift      |  68 ++++++++++++++++++
 .../contents.xcplayground                     |   4 ++
 .../contents.xcworkspacedata                  |   7 ++
 .../UserInterfaceState.xcuserstate            | Bin 0 -> 17083 bytes
 Task4_practice.playground/timeline.xctimeline |  26 +++++++
 .../xcschemes/xcschememanagement.plist        |  16 +++++
 Task5_practice.playground/Contents.swift      |  51 +++++++++++++
 .../contents.xcplayground                     |   4 ++
 .../contents.xcworkspacedata                  |   7 ++
 .../UserInterfaceState.xcuserstate            | Bin 0 -> 19230 bytes
 Task5_practice.playground/timeline.xctimeline |  30 ++++++++
 28 files changed, 396 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Task1_practice.playground/Contents.swift
 create mode 100644 Task1_practice.playground/contents.xcplayground
 create mode 100644 Task1_practice.playground/playground.xcworkspace/contents.xcworkspacedata
 create mode 100644 Task1_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
 create mode 100644 Task1_practice.playground/timeline.xctimeline
 create mode 100644 Task2_pracitce.playground/Contents.swift
 create mode 100644 Task2_pracitce.playground/contents.xcplayground
 create mode 100644 Task2_pracitce.playground/playground.xcworkspace/contents.xcworkspacedata
 create mode 100644 Task2_pracitce.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
 create mode 100644 Task2_pracitce.playground/timeline.xctimeline
 create mode 100644 Task2_pracitce.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist
 create mode 100644 Task3_practice.playground/Contents.swift
 create mode 100644 Task3_practice.playground/contents.xcplayground
 create mode 100644 Task3_practice.playground/playground.xcworkspace/contents.xcworkspacedata
 create mode 100644 Task3_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
 create mode 100644 Task3_practice.playground/timeline.xctimeline
 create mode 100644 Task4_practice.playground/Contents.swift
 create mode 100644 Task4_practice.playground/contents.xcplayground
 create mode 100644 Task4_practice.playground/playground.xcworkspace/contents.xcworkspacedata
 create mode 100644 Task4_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
 create mode 100644 Task4_practice.playground/timeline.xctimeline
 create mode 100644 Task4_practice.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist
 create mode 100644 Task5_practice.playground/Contents.swift
 create mode 100644 Task5_practice.playground/contents.xcplayground
 create mode 100644 Task5_practice.playground/playground.xcworkspace/contents.xcworkspacedata
 create mode 100644 Task5_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
 create mode 100644 Task5_practice.playground/timeline.xctimeline

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..135767f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,26 @@
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon

+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
diff --git a/Task1_practice.playground/Contents.swift b/Task1_practice.playground/Contents.swift
new file mode 100644
index 0000000..9d2e048
--- /dev/null
+++ b/Task1_practice.playground/Contents.swift
@@ -0,0 +1,26 @@
+import Foundation
+
+// Write your code here...
+
+func varProcessor(_ n: Any) {
+    let nInt = n as? Int ?? 0 // 如果n是整形数，nInt将会被赋予n的值
+    let nString = n as? String ?? "" // 如果n是字符串，nString将会被赋予n的值
+    switch n {
+    case is Int:
+        // 如果n是整形，这里的代码将会被执行
+        // Write your code here...
+    case is String:
+        // 如果n是字符串，这里的代码将会被执行
+        // Write your code here...
+    default:
+        print("An error occurred.")
+    }
+}
+
+// 测试用，不需要改动
+
+let test: [Any] = [0, 2, 0.2, "Hello"]
+
+for item in test {
+    varProcessor(item)
+}
diff --git a/Task1_practice.playground/contents.xcplayground b/Task1_practice.playground/contents.xcplayground
new file mode 100644
index 0000000..1c968e7
--- /dev/null
+++ b/Task1_practice.playground/contents.xcplayground
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/Task1_practice.playground/playground.xcworkspace/contents.xcworkspacedata b/Task1_practice.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..ca3329e
--- /dev/null
+++ b/Task1_practice.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:">
+   </FileRef>
+</Workspace>
diff --git a/Task1_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate b/Task1_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000000000000000000000000000000000000..f7e316577577b10a45c94fc4f3ce66a87cccafa1
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diff --git a/Task1_practice.playground/timeline.xctimeline b/Task1_practice.playground/timeline.xctimeline
new file mode 100644
index 0000000..8eef80a
--- /dev/null
+++ b/Task1_practice.playground/timeline.xctimeline
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task1_practice.playground#CharacterRangeLen=532&amp;CharacterRangeLoc=0&amp;EndingColumnNumber=0&amp;EndingLineNumber=26&amp;StartingColumnNumber=0&amp;StartingLineNumber=0&amp;Timestamp=689874495.77337"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>
diff --git a/Task2_pracitce.playground/Contents.swift b/Task2_pracitce.playground/Contents.swift
new file mode 100644
index 0000000..b339d7c
--- /dev/null
+++ b/Task2_pracitce.playground/Contents.swift
@@ -0,0 +1,22 @@
+import Foundation
+
+func varProcessor(_ n: Any, /* Write your code here */) {
+    let nInt = n as? Int ?? 0 // 如果n是整形数，nInt将会被赋予n的值
+    let nString = n as? String ?? "" // 如果n是字符串，nString将会被赋予n的值
+    switch n{
+    case is Int:
+        // 如果n是整型，这里的代码将会被执行
+        // Write your code here...
+    case is String:
+        // 如果n是字符串，这里的代码将会被执行
+        // Write your code here...
+    default:
+        print("An error occurred.")
+    }
+}
+
+let test: [Any] = [0, 2, 0.2, "Hello"]
+
+for item in test {
+    varProcessor(item, /* Write your code here */)
+}
diff --git a/Task2_pracitce.playground/contents.xcplayground b/Task2_pracitce.playground/contents.xcplayground
new file mode 100644
index 0000000..1c968e7
--- /dev/null
+++ b/Task2_pracitce.playground/contents.xcplayground
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/Task2_pracitce.playground/playground.xcworkspace/contents.xcworkspacedata b/Task2_pracitce.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..ca3329e
--- /dev/null
+++ b/Task2_pracitce.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:">
+   </FileRef>
+</Workspace>
diff --git a/Task2_pracitce.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate b/Task2_pracitce.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
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diff --git a/Task2_pracitce.playground/timeline.xctimeline b/Task2_pracitce.playground/timeline.xctimeline
new file mode 100644
index 0000000..f2b0fe7
--- /dev/null
+++ b/Task2_pracitce.playground/timeline.xctimeline
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task2_pracitce.playground#CharacterRangeLen=528&amp;CharacterRangeLoc=17&amp;EndingColumnNumber=0&amp;EndingLineNumber=22&amp;StartingColumnNumber=17&amp;StartingLineNumber=0&amp;Timestamp=689908036.025995"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>
diff --git a/Task2_pracitce.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist b/Task2_pracitce.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..39eaece
--- /dev/null
+++ b/Task2_pracitce.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>Task2_pracitce (Playground).xcscheme</key>
+		<dict>
+			<key>isShown</key>
+			<false/>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/Task3_practice.playground/Contents.swift b/Task3_practice.playground/Contents.swift
new file mode 100644
index 0000000..49abc89
--- /dev/null
+++ b/Task3_practice.playground/Contents.swift
@@ -0,0 +1,14 @@
+import Foundation
+
+struct Entity {
+    // Write your code here
+}
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^\\d{13}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return false
+// }
+// return true
diff --git a/Task3_practice.playground/contents.xcplayground b/Task3_practice.playground/contents.xcplayground
new file mode 100644
index 0000000..1c968e7
--- /dev/null
+++ b/Task3_practice.playground/contents.xcplayground
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/Task3_practice.playground/playground.xcworkspace/contents.xcworkspacedata b/Task3_practice.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..ca3329e
--- /dev/null
+++ b/Task3_practice.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:">
+   </FileRef>
+</Workspace>
diff --git a/Task3_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate b/Task3_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/Task3_practice.playground/timeline.xctimeline b/Task3_practice.playground/timeline.xctimeline
new file mode 100644
index 0000000..255d579
--- /dev/null
+++ b/Task3_practice.playground/timeline.xctimeline
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task3_practice.playground#CharacterRangeLen=414&amp;CharacterRangeLoc=17&amp;EndingColumnNumber=0&amp;EndingLineNumber=14&amp;StartingColumnNumber=17&amp;StartingLineNumber=0&amp;Timestamp=689911183.10065"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task3_practice.playground#CharacterRangeLen=414&amp;CharacterRangeLoc=17&amp;EndingColumnNumber=0&amp;EndingLineNumber=14&amp;StartingColumnNumber=17&amp;StartingLineNumber=0&amp;Timestamp=689911183.10071"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task3_practice.playground#CharacterRangeLen=414&amp;CharacterRangeLoc=17&amp;EndingColumnNumber=0&amp;EndingLineNumber=14&amp;StartingColumnNumber=17&amp;StartingLineNumber=0&amp;Timestamp=689911183.100747"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task3_practice.playground#CharacterRangeLen=414&amp;CharacterRangeLoc=17&amp;EndingColumnNumber=0&amp;EndingLineNumber=14&amp;StartingColumnNumber=17&amp;StartingLineNumber=0&amp;Timestamp=689911183.100782"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task3_practice.playground#CharacterRangeLen=414&amp;CharacterRangeLoc=17&amp;EndingColumnNumber=0&amp;EndingLineNumber=14&amp;StartingColumnNumber=17&amp;StartingLineNumber=0&amp;Timestamp=689911183.1008151"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>
diff --git a/Task4_practice.playground/Contents.swift b/Task4_practice.playground/Contents.swift
new file mode 100644
index 0000000..b010ab3
--- /dev/null
+++ b/Task4_practice.playground/Contents.swift
@@ -0,0 +1,68 @@
+import Foundation
+
+class Entity {
+    // Write your code here
+    func verify() -> Bool {
+        // Write your code here
+    }
+}
+
+class Student: Entity {
+    override func verify() -> Bool {
+        // Write your code here
+    }
+}
+
+class Cat: Entity {
+    override func verify() -> Bool {
+        // Write your code here
+    }
+}
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字，以20xx开头，第5位为1-3的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^20\\d{2}[1-3]\\d{8}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return false
+// }
+// return true
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^\\d{13}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return false
+// }
+// return true
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字，开头为0000的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^0000\\d{9}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return false
+// }
+// return true
+
+//测试用，不需要改动
+var fly = Entity()
+fly.ID = "0000000099003"
+fly.name = "蒼蠅"
+fly.verify()
+
+var siuming = Student()
+siuming.ID = "2021502233076"
+siuming.name = "小明"
+siuming.verify()
+
+var siuhung = Student()
+siuhung.ID = "2022302191000"
+siuhung.name = "小紅"
+siuhung.verify()
+
+var policecat = Cat()
+policecat.ID = "0000999988222"
+policecat.name = "警長"
+policecat.verify()
diff --git a/Task4_practice.playground/contents.xcplayground b/Task4_practice.playground/contents.xcplayground
new file mode 100644
index 0000000..1c968e7
--- /dev/null
+++ b/Task4_practice.playground/contents.xcplayground
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/Task4_practice.playground/playground.xcworkspace/contents.xcworkspacedata b/Task4_practice.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..ca3329e
--- /dev/null
+++ b/Task4_practice.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:">
+   </FileRef>
+</Workspace>
diff --git a/Task4_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate b/Task4_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/Task4_practice.playground/timeline.xctimeline b/Task4_practice.playground/timeline.xctimeline
new file mode 100644
index 0000000..a3965cf
--- /dev/null
+++ b/Task4_practice.playground/timeline.xctimeline
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task4_practice.playground#CharacterRangeLen=740&amp;CharacterRangeLoc=1090&amp;EndingColumnNumber=0&amp;EndingLineNumber=68&amp;StartingColumnNumber=0&amp;StartingLineNumber=38&amp;Timestamp=689912106.149693"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task4_practice.playground#CharacterRangeLen=740&amp;CharacterRangeLoc=1090&amp;EndingColumnNumber=0&amp;EndingLineNumber=68&amp;StartingColumnNumber=0&amp;StartingLineNumber=38&amp;Timestamp=689912106.149847"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task4_practice.playground#CharacterRangeLen=740&amp;CharacterRangeLoc=1090&amp;EndingColumnNumber=0&amp;EndingLineNumber=68&amp;StartingColumnNumber=0&amp;StartingLineNumber=38&amp;Timestamp=689912106.14995"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task4_practice.playground#CharacterRangeLen=740&amp;CharacterRangeLoc=1090&amp;EndingColumnNumber=0&amp;EndingLineNumber=68&amp;StartingColumnNumber=0&amp;StartingLineNumber=38&amp;Timestamp=689912106.150052"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task4_practice.playground#CharacterRangeLen=740&amp;CharacterRangeLoc=1090&amp;EndingColumnNumber=0&amp;EndingLineNumber=68&amp;StartingColumnNumber=0&amp;StartingLineNumber=38&amp;Timestamp=689912106.150148"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>
diff --git a/Task4_practice.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist b/Task4_practice.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..227c1fb
--- /dev/null
+++ b/Task4_practice.playground/xcuserdata/ostrichb.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>Task4_practice (Playground).xcscheme</key>
+		<dict>
+			<key>isShown</key>
+			<false/>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/Task5_practice.playground/Contents.swift b/Task5_practice.playground/Contents.swift
new file mode 100644
index 0000000..f50ef01
--- /dev/null
+++ b/Task5_practice.playground/Contents.swift
@@ -0,0 +1,51 @@
+import Foundation
+
+// 把 task 4 得成果贴过来，在 task 4 的基础上继续往下写
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字，以20xx开头，第5位为1-3的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^20\\d{2}[1-3]\\d{8}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return nil
+// }
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^\\d{13}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return nil
+// }
+
+// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字，开头为0000的情况，可以直接照搬
+// let reFormula = try! NSRegularExpression(pattern: "^0000\\d{9}$", options: [NSRegularExpression.Options.anchorsMatchLines])
+// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
+// let matchList = reFormula.matches(in: ID, range: matchRange)
+// if matchList.count != 1 {
+//     return nil
+// }
+
+// 测试用，不需要更改
+var siuziu = Student(id: "2022202121000", name: "小趙")
+var siuchow = Student(id: "2000503205613", name: "小周")
+var studentList = [siuziu, siuchow]
+
+for item in studentList {
+    guard item != nil else {
+        print("Invalid students")
+        continue
+    }
+    do {
+        var count = 0
+        while true{
+            count += 1
+            try item!.work()
+            print("Siu Ziu has worked for \(String(count)) \(count <= 1 ? "hour" : "hours").")
+        }
+    }
+    catch InsufficientEnergy.crazyThursdayVMe50 {
+        print("I'm hungry, please v me 50!")
+    }
+}
+
diff --git a/Task5_practice.playground/contents.xcplayground b/Task5_practice.playground/contents.xcplayground
new file mode 100644
index 0000000..1c968e7
--- /dev/null
+++ b/Task5_practice.playground/contents.xcplayground
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/Task5_practice.playground/playground.xcworkspace/contents.xcworkspacedata b/Task5_practice.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..ca3329e
--- /dev/null
+++ b/Task5_practice.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:">
+   </FileRef>
+</Workspace>
diff --git a/Task5_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate b/Task5_practice.playground/playground.xcworkspace/xcuserdata/ostrichb.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/Task5_practice.playground/timeline.xctimeline b/Task5_practice.playground/timeline.xctimeline
new file mode 100644
index 0000000..f01073e
--- /dev/null
+++ b/Task5_practice.playground/timeline.xctimeline
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task5_practice.playground#CharacterRangeLen=1676&amp;CharacterRangeLoc=57&amp;EndingColumnNumber=0&amp;EndingLineNumber=51&amp;StartingColumnNumber=0&amp;StartingLineNumber=3&amp;Timestamp=689915859.917581"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task5_practice.playground#CharacterRangeLen=1676&amp;CharacterRangeLoc=57&amp;EndingColumnNumber=0&amp;EndingLineNumber=51&amp;StartingColumnNumber=0&amp;StartingLineNumber=3&amp;Timestamp=689915859.917655"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task5_practice.playground#CharacterRangeLen=1676&amp;CharacterRangeLoc=57&amp;EndingColumnNumber=0&amp;EndingLineNumber=51&amp;StartingColumnNumber=0&amp;StartingLineNumber=3&amp;Timestamp=689915859.9177051"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task5_practice.playground#CharacterRangeLen=1676&amp;CharacterRangeLoc=57&amp;EndingColumnNumber=0&amp;EndingLineNumber=51&amp;StartingColumnNumber=0&amp;StartingLineNumber=3&amp;Timestamp=689915859.91775"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task5_practice.playground#CharacterRangeLen=1676&amp;CharacterRangeLoc=57&amp;EndingColumnNumber=0&amp;EndingLineNumber=51&amp;StartingColumnNumber=0&amp;StartingLineNumber=3&amp;Timestamp=689915859.9177901"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ostrichb/Downloads/Task5_practice.playground#CharacterRangeLen=6&amp;CharacterRangeLoc=1162&amp;EndingColumnNumber=11&amp;EndingLineNumber=29&amp;StartingColumnNumber=5&amp;StartingLineNumber=29&amp;Timestamp=689915859.917832"
+         selectedRepresentationIndex = "0">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>