2

exercises/error_handling/errors1.rs

@@ -1,3 +1,13 @@
+/*
+ * @Author: git.exe config user.name && error: git config user.email & please set dead value or install git
+ * @Date: 2025-01-11 11:25:38
+ * @LastEditors: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
+ * @LastEditTime: 2025-01-11 19:05:44
+ * @FilePath: /rust-rustlings-2024-autumn-7qing/exercises/error_handling/errors1.rs
+ * @Description:
+ *
+ * Copyright (c) 2025 by ${git_name_email}, All Rights Reserved.
+ */
 // errors1.rs
 //
 // This function refuses to generate text to be printed on a nametag if you pass
@@ -9,14 +19,12 @@
 // Execute `rustlings hint errors1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
-pub fn generate_nametag_text(name: String) -> Option<String> {
+pub fn generate_nametag_text(name: String) -> Result<String, String> {
     if name.is_empty() {
         // Empty names aren't allowed.
-        None
+        Err("`name` was empty; it must be nonempty.".into())
     } else {
-        Some(format!("Hi! My name is {}", name))
+        Ok(format!("Hi! My name is {}", name))
     }
 }
 

exercises/options/options1.rs

@@ -1,10 +1,18 @@
+/*
+ * @Author: git.exe config user.name && error: git config user.email & please set dead value or install git
+ * @Date: 2025-01-11 11:25:38
+ * @LastEditors: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
+ * @LastEditTime: 2025-01-11 15:44:42
+ * @FilePath: /rust-rustlings-2024-autumn-7qing/exercises/options/options1.rs
+ * @Description:
+ *
+ * Copyright (c) 2025 by ${git_name_email}, All Rights Reserved.
+ */
 // options1.rs
 //
 // Execute `rustlings hint options1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 // This function returns how much icecream there is left in the fridge.
 // If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
 // all, so there'll be no more left :(
@@ -13,7 +21,13 @@ fn maybe_icecream(time_of_day: u16) -> Option<u16> {
     // value of 0 The Option output should gracefully handle cases where
     // time_of_day > 23.
     // TODO: Complete the function body - remember to return an Option!
-    ???
+    if time_of_day < 22 {
+        Some(5)
+    } else if time_of_day < 24 {
+        Some(0)
+    } else {
+        None
+    }
 }
 
 #[cfg(test)]
@@ -34,6 +48,6 @@ mod tests {
         // TODO: Fix this test. How do you get at the value contained in the
         // Option?
         let icecreams = maybe_icecream(12);
-        assert_eq!(icecreams, 5);
+        assert_eq!(icecreams, Some(5));
     }
 }

exercises/options/options2.rs

@@ -1,10 +1,18 @@
+/*
+ * @Author: git.exe config user.name && error: git config user.email & please set dead value or install git
+ * @Date: 2025-01-11 11:25:38
+ * @LastEditors: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
+ * @LastEditTime: 2025-01-11 18:52:11
+ * @FilePath: /rust-rustlings-2024-autumn-7qing/exercises/options/options2.rs
+ * @Description:
+ *
+ * Copyright (c) 2025 by ${git_name_email}, All Rights Reserved.
+ */
 // options2.rs
 //
 // Execute `rustlings hint options2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 #[cfg(test)]
 mod tests {
     #[test]
@@ -13,8 +21,8 @@ mod tests {
         let optional_target = Some(target);
 
         // TODO: Make this an if let statement whose value is "Some" type
-        word = optional_target {
-            assert_eq!(word, target);
+        if let word = optional_target {
+            assert_eq!(word, Some(target));
         }
     }
 
@@ -32,7 +40,7 @@ mod tests {
         // TODO: make this a while let statement - remember that vector.pop also
         // adds another layer of Option<T>. You can stack `Option<T>`s into
         // while let and if let.
-        integer = optional_integers.pop() {
+        while let Some(Some(integer)) = optional_integers.pop() {
             assert_eq!(integer, cursor);
             cursor -= 1;
         }

exercises/options/options3.rs

@@ -1,10 +1,18 @@
+/*
+ * @Author: git.exe config user.name && error: git config user.email & please set dead value or install git
+ * @Date: 2025-01-11 11:25:38
+ * @LastEditors: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
+ * @LastEditTime: 2025-01-11 18:56:29
+ * @FilePath: /rust-rustlings-2024-autumn-7qing/exercises/options/options3.rs
+ * @Description:
+ *
+ * Copyright (c) 2025 by ${git_name_email}, All Rights Reserved.
+ */
 // options3.rs
 //
 // Execute `rustlings hint options3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 struct Point {
     x: i32,
     y: i32,
@@ -14,8 +22,9 @@ fn main() {
     let y: Option<Point> = Some(Point { x: 100, y: 200 });
 
     match y {
-        Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
+        Some(ref p) => println!("Co-ordinates are {},{} ", p.x, p.y),
         _ => panic!("no match!"),
     }
+
     y; // Fix without deleting this line.
 }

exercises/quiz2.rs

@@ -1,3 +1,13 @@
+/*
+ * @Author: git.exe config user.name && error: git config user.email & please set dead value or install git
+ * @Date: 2025-01-11 11:25:38
+ * @LastEditors: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
+ * @LastEditTime: 2025-01-11 15:37:19
+ * @FilePath: /rust-rustlings-2024-autumn-7qing/exercises/quiz2.rs
+ * @Description:
+ *
+ * Copyright (c) 2025 by ${git_name_email}, All Rights Reserved.
+ */
 // quiz2.rs
 //
 // This is a quiz for the following sections:
@@ -20,8 +30,6 @@
 //
 // No hints this time!
 
-// I AM NOT DONE
-
 pub enum Command {
     Uppercase,
     Trim,
@@ -32,11 +40,20 @@ mod my_module {
     use super::Command;
 
     // TODO: Complete the function signature!
-    pub fn transformer(input: ???) -> ??? {
+    pub fn transformer(input: Vec<(String, Command)>) -> Vec<String> {
         // TODO: Complete the output declaration!
-        let mut output: ??? = vec![];
+        let mut output: Vec<String> = vec![];
         for (string, command) in input.iter() {
             // TODO: Complete the function body. You can do it!
+            match command {
+                Command::Trim => output.push(string.trim().to_string()),
+                Command::Uppercase => output.push(string.to_uppercase()),
+                Command::Append(x) => {
+                    let mut result = string.clone();
+                    result.push_str(&"bar".repeat(*x));
+                    output.push(result);
+                }
+            }
         }
         output
     }
@@ -45,7 +62,7 @@ mod my_module {
 #[cfg(test)]
 mod tests {
     // TODO: What do we need to import to have `transformer` in scope?
-    use ???;
+    use super::my_module::transformer;
     use super::Command;
 
     #[test]