feat: ✨ vectors

21-vectors/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "vectors"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

21-vectors/src/main.rs

@@ -0,0 +1,54 @@
+enum Types {
+    Number(i32),
+    String(String),
+    Float(f32),
+}
+fn main() {
+    println!("Hello, world!");
+    // Actually no need to specify type but I did
+    let mut numbers: Vec<i32> = Vec::new();
+
+    // This adds element to the end of vector
+    numbers.push(0);
+    numbers.push(1);
+
+    for _ in 0..3 {
+        // This tries to remove last element from vector
+        match numbers.pop() {
+            Some(popped) => println!("{}", popped),
+            None => eprintln!("Error: Vector is Empty"),
+        }
+    }
+
+    // This is macro for vector
+    let texts = vec!["Hello", "My", "Friend"];
+
+    // Iteration over vector
+    for text in texts {
+        println!("{}", text);
+    }
+
+    // This won't work because of borrow checker
+    // it prevents us to modify vector in iteration.
+
+    // let mut texts = vec!["Hello", "My", "Friend"];
+    // for text in texts {
+    //     texts.push("Let me try");
+    // }
+
+    // This may seem like keeping different types
+    // actually they are belongs to same enum
+
+    let mut different_types = vec![];
+    different_types.push(Types::String(String::from("Hi!")));
+    different_types.push(Types::Number(1));
+    different_types.push(Types::Float(1.1));
+
+    for element in &different_types {
+        match element {
+            Types::Number(number) => println!("{}", number),
+            Types::String(string) => println!("{}", string),
+            Types::Float(float) => println!("{}", float),
+        }
+    }
+}