Solution 1

src/bin/problem_1.rs

@@ -0,0 +1,20 @@
+fn main() {
+    let result: i32 = (0..1000)
+        .into_iter()
+        .filter(|x| x % 3 == 0 || x % 5 == 0)
+        .sum();
+
+    println!("Result: {}", result);
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        let result: i32 = (0..10)
+            .into_iter()
+            .filter(|x| x % 3 == 0 || x % 5 == 0)
+            .sum();
+        assert_eq!(result, 23);
+    }
+}