Add implementation for valid anagram check

Author: Shah-Saumya

1-easy/0242_valid_anagram/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "valid_anagram"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

1-easy/0242_valid_anagram/src/main.rs

@@ -0,0 +1,40 @@
+// # 0242 Given two strings s and t, return true if t is an anagram of s, and false otherwise.
+
+fn main() {
+    let s = String::from("hello");
+    let t = String::from("leloh");
+    println!("{}", Solution::is_anagram(s, t));
+}
+
+use std::collections::HashMap;
+
+struct Solution;
+
+impl Solution {
+    pub fn is_anagram(s: String, t: String) -> bool {
+        let mut s_hashmap: HashMap<char, i32> = HashMap::new();
+        let mut t_hashmap: HashMap<char, i32> = HashMap::new();
+
+        Solution::numerate(&s, &mut s_hashmap);
+        Solution::numerate(&t, &mut t_hashmap);
+
+        s_hashmap == t_hashmap
+    }
+
+    fn numerate(st: &String, hm: &mut HashMap<char, i32>) {
+        let s1 = st.chars().enumerate();
+        s1.for_each(|ch| {
+            let key = ch.1;
+            let value = hm.get(&key);
+
+            match value {
+                Some(val) => {
+                    hm.insert(key, *val + 1);
+                }
+                None => {
+                    hm.insert(key, 1);
+                }
+            }
+        });
+    }
+}