generics and lifetimes

lifetimes/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "lifetimes"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

lifetimes/src/main.rs

@@ -0,0 +1,26 @@
+// fn main() {
+//     let string1 = String::from("abcd");
+//     let string2 = String::from("xyz");
+//     let result = longest(string1.as_str(), string2.as_str());
+//     println!("The longer string is: {result}");
+// }
+//
+// fn longest<'somelifetime>(a: &'somelifetime str, b: &'somelifetime str) -> &'somelifetime str {
+//     if a.len() > b.len() { a } else { b }
+// }
+//
+struct ImportantExcerpt<'a> {
+    part: &'a str,
+}
+//
+// fn return_excerpt(story: ImportantExcerpt) -> &'a str {
+//     let first_sentence = novel.split('.')
+// }
+
+fn main() {
+    let novel = String::from("Call me Ishmael. Some years ago...");
+    let first_sentence = novel.split('.').next().unwrap();
+    let i = ImportantExcerpt {
+        part: first_sentence,
+    };
+}