1 files changed, 39 insertions, 0 deletions
diff --git a/challenge-196/roger-bell-west/rust/ch-2.rs b/challenge-196/roger-bell-west/rust/ch-2.rs
new file mode 100755
index 0000000000..6ebff610fc
--- /dev/null
+++ b/challenge-196/roger-bell-west/rust/ch-2.rs
@@ -0,0 +1,39 @@
+#! /bin/sh
+//usr/bin/env rustc --test $0 -o ${0}x && ./${0}x --nocapture; rm -f ${0}x ; exit
+
+#[test]
+fn test_ex1() {
+    assert_eq!(rangelist(vec![1, 3, 4, 5, 7]), vec![vec![3, 5]]);
+}
+
+#[test]
+fn test_ex2() {
+    assert_eq!(rangelist(vec![1, 2, 3, 6, 7, 9]), vec![vec![1, 3], vec![6, 7]]);
+}
+
+#[test]
+fn test_ex3() {
+    assert_eq!(
+        rangelist(vec![0, 1, 2, 4, 5, 6, 8, 9]),
+        vec![vec![0, 2], vec![4, 6], vec![8, 9]]
+    );
+}
+
+fn rangelist(l: Vec<isize>) -> Vec<Vec<isize>> {
+    let mut o = Vec::new();
+    let mut start = l[0];
+    let mut prev = start;
+    for &v in l.iter().skip(1) {
+        if v != prev + 1 {
+            if prev > start {
+                o.push(vec![start, prev]);
+            }
+            start = v;
+        }
+        prev = v;
+    }
+    if prev > start {
+        o.push(vec![start, prev]);
+    }
+    o
+}