From 8f32bb41bae289264901a1e205ab38e12fcd8d56 Mon Sep 17 00:00:00 2001
From: Luke Tidd <lukeisgreat@gmail.com>
Date: Tue, 20 Dec 2022 09:14:10 -0500
Subject: [PATCH] finally finished slice...

---
 notes             | 16 ++++++++++++++++
 plants            | 24 ++++++++++++++++++++++++
 slice/src/main.rs | 22 +++++++++++++++++++---
 3 files changed, 59 insertions(+), 3 deletions(-)
 create mode 100644 plants

diff --git a/notes b/notes
index c6857be..16090f2 100644
--- a/notes
+++ b/notes
@@ -214,4 +214,20 @@ slices
 
 reference to a contiguous sequence of elements
 
+enumerate returns a tuple with counter and reference to thing (counter, &thing)
 
+slice is a pointer to a string, with a length
+
+let s = String::from("a a a a");
+slice = &s[0..2];
+
+you can drop the first number if it's zero: let slice = &s[..2];
+or the last number if it's the end of the string: let slice = &s[4..];
+or both numbers to slice the whole thing: let slice = &s[..];
+
+you can not create a slice that starts or ends within multibyte unicode parts
+
+String: a heap allocated vector of bytes that is stored on the heap. It is potentially mutable.
+&str: an immutable borrowed string slice.
+
+let s = "string"; // string literal (it's a slice)
diff --git a/plants b/plants
new file mode 100644
index 0000000..6d17a63
--- /dev/null
+++ b/plants
@@ -0,0 +1,24 @@
+green shiso
+green shiso
+marvel of seasons
+flower
+parris island
+rouge d'hiver
+rouge d'hiver
+flower
+marvel of seasons
+marvel of seasons
+rouge d'hiver
+flower
+rouge d'hiver
+parris island
+black seeded simpson
+flower
+chives
+black seeded simpson
+dill
+flower
+red sails
+genovese basil
+deer tongue
+48 flower
diff --git a/slice/src/main.rs b/slice/src/main.rs
index 38597ac..de08fcd 100644
--- a/slice/src/main.rs
+++ b/slice/src/main.rs
@@ -1,4 +1,4 @@
-fn first_word(s: &String) -> usize {
+fn first_word_int(s: &str) -> usize {
     let b = s.as_bytes();
     for (i, &val) in b.iter().enumerate() {
         if val == b' ' {
@@ -7,7 +7,23 @@ fn first_word(s: &String) -> usize {
     }
     s.len()
 }
-fn main() {
-    println!("{}", first_word(&String::from("sadf sdfsd fesf")));
 
+fn first_word(s: &str) -> &str {
+    let b = s.as_bytes();
+    for (i, &val) in b.iter().enumerate() {
+        if val == b' ' {
+            return &s[..i];
+        }
+    }
+    &s[..]
+}
+fn main() {
+    let test_string = "oh my gerd";
+    let string = String::from("sdf sdf esv gs ");
+    let slice = &string[0..first_word_int(&string)];
+    println!("here is the first word: _{}_", slice);
+
+    println!("here is the first word: _{}_", first_word(&string));
+    println!("here is the first word: _{}_", first_word(test_string));
+    println!("{}", test_string);
 }