[rust] High Score

1 files changed, 29 insertions, 0 deletions

diff --git a/high-scores/src/lib.rs b/high-scores/src/lib.rs
new file mode 100644
index 0000000..a7e6c3d
--- /dev/null
+++ b/high-scores/src/lib.rs
@@ -0,0 +1,29 @@
+#[derive(Debug)]
+pub struct HighScores<'a> {
+    scores: &'a [u32]
+}
+
+impl<'a> HighScores<'a> {
+    pub fn new(scores: &'a [u32]) -> Self {
+        HighScores{ scores }
+    }
+
+    pub fn scores(&self) -> &[u32] {
+        self.scores
+    }
+
+    pub fn latest(&self) -> Option<u32> {
+        self.scores.last().copied()
+    }
+
+    pub fn personal_best(&self) -> Option<u32> {
+        self.scores.iter().max().copied()
+    }
+
+    pub fn personal_top_three(&self) -> Vec<u32> {
+        let mut top3 = self.scores.to_vec();
+        top3.sort_unstable_by(|a,b| b.cmp(a));
+        top3.truncate(3);
+        top3
+    }
+}