March 17, 2016 07:28 · Mar 17, 2016
diff --git a/playground.rs b/playground.rs
@@ -0,0 +1,19 @@
+use std::collections::HashMap;
+
+fn create_hashmap(strand_a: &str, strand_b: &str) -> HashMap<char, char> {
+    let strand_a: Vec<_> = strand_a.chars().collect();
+    let strand_b: Vec<_> = strand_b.chars().collect();
+
+    strand_a.iter().zip(strand_b.iter()).map(|(&a, &b)| (a, b)).collect()
+}
+
+fn main() {
+    let strand_a = "ABCD";
+    let strand_b = "DCBA";
+
+    let hashmap = create_hashmap(strand_a, strand_b);    
+
+    let foo: Vec<_> = "BCAD".chars().map(|c| hashmap.get(&c).unwrap()).collect();
+
+    println!("{:?}", foo);
+}