58 lines
1.2 KiB
Rust
58 lines
1.2 KiB
Rust
use std::fmt::Display;
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struct ImportantExcerpt<'a> {
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part: &'a str,
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}
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impl<'a> ImportantExcerpt<'a> {
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fn level(&self) -> i32 {
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3
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}
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fn announce_and_return_part(&self, announcement: &str) -> &str {
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println!("Attention please: {}", announcement);
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self.part
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}
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}
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fn main() {
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let string1 = String::from("abcd");
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let string2 = "xyz";
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let result = longest(string1.as_str(), string2);
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println!("The longest string is {}", result);
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let string1 = String::from("long string is long");
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{
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let string2 = String::from("xyz");
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let result = longest(string1.as_str(), string2.as_str());
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println!("The longest string is {}", result);
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}
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let novel = String::from("Call me Ishmael. Some years ago...");
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let first_sentence = novel.split('.')
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.next()
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.expect("Could not find a '.'");
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let _i = ImportantExcerpt { part: first_sentence };
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}
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fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
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if x.len() > y.len() {
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x
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} else {
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y
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}
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}
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fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
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where T: Display
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{
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println!("Announcement! {}", ann);
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if x.len() > y.len() {
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x
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} else {
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y
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}
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}
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