some more stuff

ch4/slices/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "slices"
+version = "0.1.0"

ch4/slices/Cargo.toml

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

ch4/slices/src/main.rs

@@ -0,0 +1,18 @@
+fn first_word(s: &String) -> usize {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return i;
+        }
+    }
+
+    s.len()
+}
+ 
+fn main() {
+    let mut s = String::from("hello world");
+    let word = first_word(&s);
+    println!("{}", word);
+    s.clear();
+}