organizado en carpetas

curso_tinchicusls/slices/Cargo.toml

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

curso_tinchicusls/slices/src/main.rs

@@ -0,0 +1,16 @@
+fn primera_palabra(s: &String) -> usize {
+    let b = s.as_bytes();
+    for (i, &item) in b.iter().enumerate() {
+        if item == b' ' {
+            return i;
+        }
+    }
+    s.len()
+}
+
+fn main() {
+    let s = String::from("Hola Mundo Cruel");
+    let pos = primera_palabra(&s);
+    let palabra = &s[0..pos];
+    println!("{}", palabra);
+}