Unfold example.

1 files changed, 16 insertions, 0 deletions

diff --git a/rust/graph/unfold.rs b/rust/graph/unfold.rs
new file mode 100644
index 0000000..90de74c
--- /dev/null
+++ b/rust/graph/unfold.rs
@@ -0,0 +1,16 @@
+extern crate itertools;
+
+use itertools::Unfold;
+
+fn main() {
+    for n in Unfold::new(1, |state| {
+        if *state < 100 {
+            *state += 1;
+            Some(*state)
+        } else {
+            None
+        }
+    }) {
+        println!("{}", n);
+    }
+}