Rust learning: lessons, notes, and exercise crates

slice/.gitignore

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+/target

slice/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "slice"
+version = "0.1.0"

slice/Cargo.toml

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+[package]
+name = "slice"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

slice/src/main.rs

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+fn main() {
+    let mut s = String::from("hello world");
+    let word = first_word(&s);
+
+    println!("{word}");
+
+    s.clear();
+}
+
+fn first_word(s: &str) -> &str {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return &s[..i];
+        }
+    }
+    &s[..]
+}