practice leetcode - find the index of the first occurrence in a string

src/practice/leetcode/find_the_index_of_the_first_occurence_in_a_string/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "find_the_index_of_the_first_occurence_in_a_string"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

src/practice/leetcode/find_the_index_of_the_first_occurence_in_a_string/src/main.rs

@@ -0,0 +1,17 @@
+// https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string
+
+struct Solution;
+
+impl Solution {
+    pub fn str_str(haystack: String, needle: String) -> i32 {
+        match haystack.find(&needle) {
+            Some(z) => z as i32,
+            None => -1,
+        }
+    }
+}
+
+fn main() {
+    let result = Solution::str_str("sadbutsad".to_string(), "sad".to_string());
+    println!("{result}")
+}