Updated 'src/patterns/all_places.md'.

projects/pattern_syntax_demo/Cargo.toml

@@ -1,8 +0,0 @@
-[package]
-name = "pattern_syntax_demo"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]

projects/pattern_syntax_demo/src/main.rs

@@ -1,26 +0,0 @@
-fn main() {
-    enum Message {
-        Hello { id: u32 },
-    }
-
-    let msg = Message::Hello { id: 5 };
-
-    match msg {
-        Message::Hello {
-            id: id_variable @ 3..=7,
-        } => println! ("找到位于范围内的一个 id: {}", id_variable),
-        Message::Hello { id: 10..=12 } => {
-            println! ("找到位于另一范围的一个 id");
-        },
-        Message::Hello { id } => println! ("找到别的一个 id: {}", id),
-    }
-
-    let level = 0.8;
-
-    match level {
-        l if l >= 1.0 => println! ("超出额度"),
-        l if l >= 0.9 => println! ("超出 90% 额度"),
-        l if l >= 0.75 => println! ("超出 75% 额度"),
-        _ => (),
-    }
-}

projects/patterns/Cargo.toml

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

projects/patterns/src/main.rs

@@ -0,0 +1,7 @@
+fn main() {
+    let v = vec! ['a', 'b', 'c'];
+
+    for (index, value) in v.iter().enumerate() {
+        println! ("{} 处于索引 {} 处", value, index);
+    }
+}