Merge pull request #7638 from ealvar3z/challenge-205_eax

Rust solution for week 205

5 files changed, 68 insertions, 2 deletions

diff --git a/challenge-202/ealvar3z/README b/challenge-202/ealvar3z/README
index a50c065308..d35a294b26 100644
--- a/challenge-202/ealvar3z/README
+++ b/challenge-202/ealvar3z/README
@@ -1 +1 @@
-Solution by ealvar3z
+Solution by ealvar3z. Run `cargo test` to check them.
diff --git a/challenge-202/ealvar3z/blog.txt b/challenge-202/ealvar3z/blog.txt
new file mode 100644
index 0000000000..c849c43be3
--- /dev/null
+++ b/challenge-202/ealvar3z/blog.txt
@@ -0,0 +1 @@
+https://eax.bearblog.dev/perl-weekly-challenge-205/
diff --git a/challenge-202/ealvar3z/go/.gitignore b/challenge-202/ealvar3z/go/.gitignore
deleted file mode 100644
index 654da7a30f..0000000000
--- a/challenge-202/ealvar3z/go/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-go.mod
diff --git a/challenge-202/ealvar3z/rust/.gitignore b/challenge-202/ealvar3z/rust/.gitignore
new file mode 100644
index 0000000000..9a30948bdd
--- /dev/null
+++ b/challenge-202/ealvar3z/rust/.gitignore
@@ -0,0 +1,3 @@
+/target
+Cargo.toml
+Cargo.lock
diff --git a/challenge-202/ealvar3z/rust/src/main.rs b/challenge-202/ealvar3z/rust/src/main.rs
new file mode 100644
index 0000000000..0a38c837a5
--- /dev/null
+++ b/challenge-202/ealvar3z/rust/src/main.rs
@@ -0,0 +1,63 @@
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    pub fn test_task_one() {
+        let a = [5,3,4];
+        let b = [5,6];
+        let c = [5,4,4,3];
+
+        assert_eq!(task_one(&a), 3);
+        assert_eq!(task_one(&b), 6);
+        assert_eq!(task_one(&c), 3);
+    }
+
+    #[test]
+    pub fn test_task_two() {
+        let a = [1,2,3,4,5,6,7];
+        let b = [2,4,1,3];
+        let c = [10,5,7,12,8];
+
+        assert_eq!(task_two(&a), 7);
+        assert_eq!(task_two(&b), 7);
+        assert_eq!(task_two(&c), 15);
+    }
+}
+
+pub fn task_one(arr: &[i32]) -> i32 {
+    let highest = arr.iter().max().cloned().unwrap_or_default();
+    let x = arr.iter().filter(|&i| *i != highest);
+    let snd_highest = x.clone().max().cloned().unwrap_or_default();
+    let third_highest = x.filter(|&i| *i != snd_highest);
+    return *third_highest.max().unwrap_or(&highest);
+}
+
+pub fn task_two(arr: &[i32]) -> i32 {
+    arr.iter()
+        .enumerate()
+        .fold(0, |max_xor, (i, &x)| {
+            arr[i+1..]
+                .iter()
+                .fold(max_xor, |max_xor, &y| {
+                    let xor = x ^ y;
+                    return xor.max(max_xor)
+                })
+        })
+}
+
+fn main() {
+    #[cfg(test)]
+    mod test_runner {
+        use super::tests;
+
+        pub fn run() {
+            tests::test_task_one();
+            tests::test_task_two();
+        }
+    }
+
+    #[cfg(test)]
+    test_runner::run();
+}
+