入门
-
Hello_World.rs
+
入门
+
配置 vscode 调试
+
+
+
参考：https://github.com/vadimcn/vscode-lldb/blob/master/MANUAL.md#source-path-remapping
+下载 CodeLLDB，选择 rust 自动生成 launch.json 文件
+{
+ "configurations": [
+ // 添加一下行，使 vec、hashmap 等类型显示正常
+ "sourceLanguages": ["rust"]
+ ]
+}
++
将编译文件与标准库的位置进行映射
+{
+ "lldb.launch.sourceMap": {
+ // 你自己的映射 hash 和映射路径
+ "/rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f": "/Users/feiwu/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust"
+ }
+}
+Hello_World.rs
fn main() {
println!("Hello, World!");
}
@@ -1002,6 +1022,62 @@
}
惯用转换
+
&str -> String
+
String::from("str");
+"str".to_string();
+"str".to_owned();
+&str -> &[u8]
+
"str".as_bytes();
+或者你也可以使用 b""
println!("{:?}", b"str");
+&str -> Vec
+
"str".as_bytes().to_vec();
+"str".as_bytes().to_owned();
+String -> &str
+
let s = String::from("str");
+let r = s.as_str();
+String -> &[u8]
+
let s = String::from("str");
+let v = s.as_bytes();
+String -> Vec
+
let s = String::from("str");
+let v = s.into_bytes();
+&[u8] -> &str
+
let b = "str".as_bytes();
+let str = std::str::from_utf8(b).unwrap();
+&[u8] -> String
+
let b = "str".as_bytes();
+let str = String::from_utf8(b.to_vec()).unwrap();
+&[u8] -> Vec
+
+
let b = "str".as_bytes();
+let str = b.to_vec();
++
let b = "str".as_bytes();
+let str = b.to_owned();
+Vec -> &str
+
let b = "str".as_bytes().to_vec();
+let s = std::str::from_utf8(&b).unwrap();
+Vec -> &[u8]
+
let b = "str".as_bytes().to_vec();
+let s = b.as_slice();
+Vec -> String
+
let b = "str".as_bytes().to_vec();
+let s = String::from_utf8(b).unwrap();
+杂项
类型断言 type-casting
let a_int = 90; // int
diff --git a/index.html b/index.html
index 35a4afa7..62444cb9 100644
--- a/index.html
+++ b/index.html
@@ -454,6 +454,9 @@
+
+ 
+
