compound-types/string #198
giscus[bot]
bot
Replies: 43 comments 17 replies
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第10题您要求修改以下代码行，但实际上是要把上面一行的 fn main() {
let raw_str = r"Escapes don't work here: \x3F \u{211D}";
// 修改以下代码行，让它工作
assert_eq!(raw_str, "Escapes don't work here: ? ℝ");
// 如果你希望在字符串中使用双引号，可以使用以下形式
let quotes = r#"And then I said: "There is no escape!""#;
println!("{}", quotes);
// 如果希望在字符串中使用 # 号，可以如下使用：
let delimiter = r###"A string with "# in it. And even "##!"###;
println!("{}", delimiter);
// 填空
let long_delimiter = __;
assert_eq!(long_delimiter, "Hello, \"##\"")
} |
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好的。。。我看看，感谢反馈 |
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看了下，确实是这个问题，非常感谢～ |
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我直接改成了 let raw_str = r"Escapes don't work here: ? ℝ";
assert_eq!(raw_str, "Escapes don't work here: ? ℝ"); |
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我自己是改成： let raw_str = r"Escapes don't work here: \x3F \u{211D}";
// 修改以下代码行，让它工作
assert_eq!(raw_str, "Escapes don't work here: \\x3F \\u{211D");這樣應該比較符合原本題目意思 |
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Done. |
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https://github.com/sunface/rust-by-practice/blob/master/solutions/collections/String.md |
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let s: Box<&str> = "hello, world".into();
当前面 当 在这个例子中，我个人理解的是：栈上保留的智能指针，指向的是 |
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"hello, world".into() 这三种转换方式有什么区别吗？还有其他转换方式吗 |
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和deRef解引用和隐式自动解引用 有关。 |
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稍微看了下源码， to_string()方法的源码实现就是③， into()是 |
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let s: Box<&str> = "hello, world".into(); 这一行代码的作用是将字符串字面量"hello, world"转换为一个 &str 类型的引用，并用 Box包装起来，你想使用这个引用，需要解引用*s |
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done! 很棒的练习题，其中几个例子也帮助我们对于字符串和切片有了更深刻的了解 |
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done! |
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完成打卡 2022/07/06 |
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第8题的答案是无法通过编译的，因为s1 没被使用 |
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utf8_slice Example 不能执行也不能修改 |
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那个依赖的库没实际被引入，只能作为代码片段参考而无法运行。 |
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Cargo.toml 中添加 然后到项目根目录下 cargo run 就可以运行了 |
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2022.11.11 Done |
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utf8_slice 的 Example 不能正常编译： |
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Cargo.toml 中添加 然后到项目根目录下 cargo run 就可以运行了 |
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Done。连着做十几道题好累，昏昏沉沉快做睡着了。 |
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第10题直接猪脑过载 |
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第十题的填空 let long_delimiter = r###"Hello,\"##\""###;
println!("{}",long_delimiter);
assert_eq!(long_delimiter, "Hello,\"##\"");为什打印出来的字符串是 Hello,"##" ，后面的断言却不通过呢 |
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long_delimiter内容是Hello,"##"，而要比较的另一个常量串是Hello,"##"。两者是不相同的。 |
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doneeeee////// >>>>> nice |
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感觉做课后作业的人不多啊。 |
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Done |
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Done |
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第三题我出现了一些错误，在Windows平台使用gnu工具链时出现了以下错误： error: could not compile 经过初步排查，似乎是由于s.push('!');引起的（因为我改成s.push_str('!');就可以成功运行了 |
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// 使用至少两种方法来修复错误 fn greetings(s: &str) { |
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mark finished |
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第2題 fn greetings(s: &str) { 以上是我說服自己的過程,希望大佬們指出錯誤,越多越好,感激不盡,腦子不夠用了Zzzz |
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damn bruh, this exercise is tough to understand initially but is rewarding |
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and others
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compound-types/string
Learning Rust By Practice, narrowing the gap between beginner and skilled-dev with challenging examples, exercises and projects.
https://zh.practice.rs/compound-types/string.html
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