accumulate

exercises/practice/accumulate/src/lib.rs

@@ -1,4 +1,12 @@
 /// What should the type of _function be?
-pub fn map(input: Vec<i32>, _function: ???) -> Vec<i32> {
-    todo!("Transform input vector {input:?} using passed function");
+pub fn map<T, U, F>(input: Vec<T>, mut _function: F ) -> Vec<U> 
+where
+    F: FnMut(T) -> U,
+{
+    let mut res = Vec::new();
+
+    for el in input {
+        res.push(_function(el));
+    }
+    res
 }