rust basic [8]

Author: yogithesymbian

src/_18_yo_slice.rs

@@ -6,3 +6,5 @@ pub fn main() {
     let slice = &numbers[1..4]; //slice includes [20, 30, 40]
     println!("Sum of slice : {}", calculate_sum(slice)) // expected result : 90
 }
+
+// Real Scenario: Efficiently process parts of large data structures without copying data.

src/_19_yo_slice_string.rs

@@ -10,3 +10,4 @@ pub fn main() {
     let message = "YoRust programming is fun!";
     println!("First word: {}", extract_first_word(message)); // expected: "YoRust"
 }
+// Real Scenario: Parse text inputs for specific substrings or keywords.

src/_20_yo_struct.rs

@@ -16,3 +16,5 @@ pub fn main() {
         user.username, user.age, user.active
     ); // expected : user details printed
 }
+
+// Real Scenario: Represent entities like users, products, or accounts.

src/_21_yo_method.rs

@@ -16,3 +16,5 @@ pub fn main() {
     };
     println!("Rectangle area: {}", rect.area()) // expected: 50
 }
+
+// Real Scenario: Use methods for data encapsulation and calculations.

src/_22_enum.rs

@@ -16,3 +16,4 @@ pub fn main() {
     let current_status = YoStatus::Online;
     print_status(current_status); // Expected: "User is online"
 }
+// Real Scenario: Represent states or configurations, such as a network status.

src/_23_yo_pattern_matching.rs

@@ -0,0 +1,9 @@
+pub fn main() {
+    let value = Some(42);
+    match value {
+        Some(num) if num > 10 => println!("Values is greater than 10: {}", num),
+        Some(num) => println!("Value is 10 or less: {}", num),
+        None => println!("No value"),
+    }
+}
+// Real Scenario: Handle optional data, like parsing user inputs.

src/_24_yo_type_alias.rs

@@ -0,0 +1,8 @@
+type YoKilometers = u32;
+
+pub fn main() {
+    let distance: YoKilometers = 120;
+    println!("Distance traveled: {} km", distance); // Expected: "120 km"
+}
+
+// Real Scenario: Use meaningful names for complex types like HashMap<String, Vec<u32>>.

src/main.rs

@@ -13,6 +13,8 @@ mod _1_variables;
 mod _20_yo_struct;
 mod _21_yo_method;
 mod _22_enum;
+mod _23_yo_pattern_matching;
+mod _24_yo_type_alias;
 mod _2_data_types;
 mod _3_numbers;
 mod _4_operators_comparison;
@@ -63,4 +65,6 @@ fn main() {
     _20_yo_struct::main();
     _21_yo_method::main();
     _22_enum::main();
+    _23_yo_pattern_matching::main();
+    _24_yo_type_alias::main();
 }