From 64d95837e9813541cf5b357de13865ce687ae98d Mon Sep 17 00:00:00 2001
From: Adam Brewer <adamhb321@gmail.com>
Date: Mon, 16 Oct 2023 07:37:12 -0400
Subject: Update Exercises Directory Names to Reflect Order

---
 exercises/18_iterators/iterators2.rs | 63 ++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 exercises/18_iterators/iterators2.rs

(limited to 'exercises/18_iterators/iterators2.rs')

diff --git a/exercises/18_iterators/iterators2.rs b/exercises/18_iterators/iterators2.rs
new file mode 100644
index 0000000..dda82a0
--- /dev/null
+++ b/exercises/18_iterators/iterators2.rs
@@ -0,0 +1,63 @@
+// iterators2.rs
+//
+// In this exercise, you'll learn some of the unique advantages that iterators
+// can offer. Follow the steps to complete the exercise.
+//
+// Execute `rustlings hint iterators2` or use the `hint` watch subcommand for a
+// hint.
+
+// I AM NOT DONE
+
+// Step 1.
+// Complete the `capitalize_first` function.
+// "hello" -> "Hello"
+pub fn capitalize_first(input: &str) -> String {
+    let mut c = input.chars();
+    match c.next() {
+        None => String::new(),
+        Some(first) => ???,
+    }
+}
+
+// Step 2.
+// Apply the `capitalize_first` function to a slice of string slices.
+// Return a vector of strings.
+// ["hello", "world"] -> ["Hello", "World"]
+pub fn capitalize_words_vector(words: &[&str]) -> Vec<String> {
+    vec![]
+}
+
+// Step 3.
+// Apply the `capitalize_first` function again to a slice of string slices.
+// Return a single string.
+// ["hello", " ", "world"] -> "Hello World"
+pub fn capitalize_words_string(words: &[&str]) -> String {
+    String::new()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_success() {
+        assert_eq!(capitalize_first("hello"), "Hello");
+    }
+
+    #[test]
+    fn test_empty() {
+        assert_eq!(capitalize_first(""), "");
+    }
+
+    #[test]
+    fn test_iterate_string_vec() {
+        let words = vec!["hello", "world"];
+        assert_eq!(capitalize_words_vector(&words), ["Hello", "World"]);
+    }
+
+    #[test]
+    fn test_iterate_into_string() {
+        let words = vec!["hello", " ", "world"];
+        assert_eq!(capitalize_words_string(&words), "Hello World");
+    }
+}
-- 
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