stuff

Author: monnetchr

src/main.rs

@@ -1,8 +1,15 @@
 mod guessgame;
 mod basics;
+mod myutils {
+    pub mod stuff;
+}
+use myutils::stuff;
 
 fn main() {
     basics::basics();
     println!();
+    stuff::collections();
+    stuff::error_handling();
+    println!();
     guessgame::guess_game();
 }

src/myutils/stuff.rs

@@ -0,0 +1,34 @@
+use core::panic;
+use std::{
+    fs::File,
+    io::{ErrorKind, Read},
+};
+
+pub fn collections() {
+    let v = vec![1, 2, 3, 4, 5];
+    println!("Vector: {:?}", v);
+}
+
+pub fn error_handling() {
+    match read_username_from_file() {
+        Ok(username) => println!("Username: {}", username),
+        Err(e) => println!("Error reading username: {:?}", e),
+    }
+
+    let f = File::open("hello.txt");
+    match f {
+        Ok(file) => file,
+        Err(error) => match error.kind() {
+            ErrorKind::NotFound => panic!("File not found: {:?}", error),
+            other_error => {
+                panic!("Fatal problem opening the file: {:?}", other_error)
+            }
+        },
+    };
+}
+
+fn read_username_from_file() -> Result<String, std::io::Error> {
+    let mut s = String::new();
+    File::open("hello.txt")?.read_to_string(&mut s)?;
+    Ok(s)
+}