Just another update

2015-02-20 00:35:01 -05:00 · 2015-02-20 00:35:01 -05:00 · 00a190b0a6
commit 00a190b0a6
parent a25938f123
6591 changed files with 94363 additions and 23227 deletions
--- a/Task/Parametric-polymorphism/Rust/parametric-polymorphism.rust
+++ b/Task/Parametric-polymorphism/Rust/parametric-polymorphism.rust
@ -0,0 +1,42 @@
+struct TreeNode<T> {
+    value: T,
+    left: Option<Box<TreeNode<T>>>,
+    right: Option<Box<TreeNode<T>>>,
+}
+
+impl <T> TreeNode<T> {
+    fn my_map<U>(&self, f: |t: &T| -> U) -> TreeNode<U> {
+        TreeNode{value: f(&self.value),
+                 left:
+                     match self.left {
+                         None => None,
+                         Some(ref n) => Some(box() n.my_map(|n| f(n))),
+                     },
+                 right:
+                     match self.right {
+                         None => None,
+                         Some(ref n) => Some(box() n.my_map(|n| f(n))),
+                     },}
+    }
+}
+
+fn main() {
+    let root =
+        TreeNode{value: 3i,
+                 left:
+                     Some(box() TreeNode{value: 55i,
+                                         left: None,
+                                         right: None,}),
+                 right:
+                     Some(box() TreeNode{value: 234i,
+                                         left:
+                                             Some(box() TreeNode{value: 0i,
+                                                                 left: None,
+                                                                 right:
+                                                                     None,}),
+                                         right: None,}),};
+    root.my_map(|x| { println!("{}" , x)});
+    println!("---------------");
+    let new_root = root.my_map(|x| *x as f64 * 333.333f64);
+    new_root.my_map(|x| { println!("{}" , x) });
+}