improve prop range splitting

src/misc.rs

@@ -0,0 +1,24 @@
+pub fn split(min: usize, max: usize, x: usize) -> Vec<Vec<usize>> {
+    if min > x || x > max {
+        return Vec::new();
+    }
+    let index = x - min;
+
+    let collected = (min..=max).collect::<Vec<usize>>();
+    let split = collected.split_at(index);
+    let mut one = split.0.to_vec();
+    one.reverse();
+    let mut two = split.1.to_vec();
+    two.remove(0);
+    vec![one, two]
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn split_test() {
+        assert_eq!(split(0, 6, 2), vec![vec![1, 0], vec![3, 4, 5, 6]]);
+    }
+}