Current Progress: 92/94

exercises/iterators/iterators4.rs

@@ -1,7 +1,6 @@
 // iterators4.rs
 // Execute `rustlings hint iterators4` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 pub fn factorial(num: u64) -> u64 {
     // Complete this function to return the factorial of num
@@ -13,7 +12,7 @@ pub fn factorial(num: u64) -> u64 {
     // For an extra challenge, don't use:
     // - recursion
     // Execute `rustlings hint iterators4` for hints.
-    vec![1..num].iter().rfold(1, |acc, x| acc + x)
+    (1..=num).rfold(1, |acc, x| acc * x)
 }
 
 #[cfg(test)]

exercises/iterators/iterators5.rs

@@ -10,7 +10,6 @@
 //
 // Make the code compile and the tests pass.
 
-// I AM NOT DONE
 
 use std::collections::HashMap;
 
@@ -34,7 +33,10 @@ fn count_for(map: &HashMap<String, Progress>, value: Progress) -> usize {
 fn count_iterator(map: &HashMap<String, Progress>, value: Progress) -> usize {
     // map is a hashmap with String keys and Progress values.
     // map = { "variables1": Complete, "from_str": None, ... }
-    todo!();
+    map
+        .iter()
+        .filter(|x| *x.1 == value)
+        .count()
 }
 
 fn count_collection_for(collection: &[HashMap<String, Progress>], value: Progress) -> usize {
@@ -53,7 +55,10 @@ fn count_collection_iterator(collection: &[HashMap<String, Progress>], value: Pr
     // collection is a slice of hashmaps.
     // collection = [{ "variables1": Complete, "from_str": None, ... },
     //     { "variables2": Complete, ... }, ... ]
-    todo!();
+    collection
+        .iter()
+        .map(|map| count_iterator(map, value))
+        .sum()
 }
 
 #[cfg(test)]