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-rwxr-xr-xrust-book/ownership/src/main.rs51
1 files changed, 51 insertions, 0 deletions
diff --git a/rust-book/ownership/src/main.rs b/rust-book/ownership/src/main.rs
new file mode 100755
index 0000000..1684f55
--- /dev/null
+++ b/rust-book/ownership/src/main.rs
@@ -0,0 +1,51 @@
+fn main() {
+ //let words = String::from("hello there world");
+ //let words = "hello there world";
+ //let first = first_word(&words);
+ //let second = second_word(&words);
+ //let last = last_word(&words);
+ //println!("{}\n{}", first, last);
+ let a = [1, 2, 3, 4, 5];
+ let slice = &a[1..4];
+
+ for each in slice {
+ println!("{}", each);
+ }
+}
+
+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
+}
+
+fn second_word(s: &str) -> &str {
+ let bytes = s.as_bytes();
+
+ for (i, &item) in bytes.iter().enumerate() {
+ if item == b' ' {
+ return &s[i + 1..];
+ }
+ }
+
+ &s
+}
+
+fn last_word(s: &str) -> &str {
+ let bytes = s.as_bytes();
+ let mut result = "";
+
+ for (i, &item) in bytes.iter().enumerate() {
+ if item == b' ' {
+ result = &s[i + 1..];
+ }
+ }
+
+ &result
+}