Initial data commit

Task/Nested-function/Rust/nested-function.rust

@@ -0,0 +1,17 @@
+fn make_list(sep: &str) -> String {
+    let mut counter = 0;
+    let mut make_item = |label| {
+        counter += 1;
+        format!("{}{}{}", counter, sep, label)
+    };
+    format!(
+        "{}\n{}\n{}",
+        make_item("First"),
+        make_item("Second"),
+        make_item("Third")
+    )
+}
+
+fn main() {
+    println!("{}", make_list(". "))
+}