slices

slices/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "slices"
+version = "0.1.0"

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]

slices/src/main.rs

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+fn main() {
+    let words = String::from("all string of words");
+    println!("{words}");
+    let first = find_first(&words);
+    println!("{first}");
+
+    let second = find_first2(&words);
+    println!("{second}");
+}
+
+
+fn find_first(words: &String) -> String {
+    let mut word = String::from("");
+    for letter in words.chars() {
+        if letter == ' ' {
+            break;
+        }
+        word.push_str(&letter.to_string());
+    }
+    word
+}
+
+
+fn find_first2(words: &str) -> &str {
+    let bytes = words.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return &words[..i];
+        }
+    }
+    &words[..]
+}