diff --git a/README.md b/README.md
index 081cb28..2ac86e0 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,8 @@ Examples
 
     extern mod mecab;
 
+    use mecab::IMeCabNode;
+
     fn main() {
         let mecab = mecab::new2("");
 
diff --git a/examples/collect-nouns.rs b/examples/collect-nouns.rs
index 5bcd875..025b759 100644
--- a/examples/collect-nouns.rs
+++ b/examples/collect-nouns.rs
@@ -3,6 +3,7 @@ extern mod mecab;
 
 use std::arc;
 
+use mecab::IMeCabNode;
 use mecab::MeCabLattice;
 use mecab::NOR_NODE;
 use mecab::UNK_NODE;
@@ -16,8 +17,9 @@ fn collect_nouns(lattice: &MeCabLattice) -> ~[~str] {
 
         if status == NOR_NODE || status == UNK_NODE {
             let feature = n.get_feature();
-            if str::eq_slice(feature.split_str(",")[0], "名詞") {
-                v.push(n.get_surface());
+            for feature.each_split_char(',') |s| {
+                if s == "名詞" { v.push(n.get_surface()); }
+                break;
             }
         }
     }
diff --git a/examples/katakanize.rs b/examples/katakanize.rs
index 395a591..59dcae4 100644
--- a/examples/katakanize.rs
+++ b/examples/katakanize.rs
@@ -1,5 +1,7 @@
 extern mod mecab;
 
+use mecab::IMeCabNode;
+
 fn main() {
     let mecab = mecab::new2("");
 
@@ -15,8 +17,12 @@ fn main() {
         let status = n.get_status();
 
         if status == mecab::NOR_NODE {
+            let mut i = 0;
             let feature = n.get_feature();
-            io::print(fmt!("%s", feature.split_str(",")[7]));
+            for feature.each_split_char(',') |s| {
+                if i == 7 { io::print(fmt!("%s", s)); }
+                i += 1;
+            }
         }
     }
 
diff --git a/examples/softwakachi.rs b/examples/softwakachi.rs
index 13cbf7c..0631e6a 100644
--- a/examples/softwakachi.rs
+++ b/examples/softwakachi.rs
@@ -1,5 +1,7 @@
 extern mod mecab;
 
+use mecab::IMeCabNode;
+
 fn main() {
     let mecab = mecab::new2("-m -a");
     let node = mecab.parse_to_node("東京特許許可局");
diff --git a/examples/wakachigaki.rs b/examples/wakachigaki.rs
index 6769d84..bed62a0 100644
--- a/examples/wakachigaki.rs
+++ b/examples/wakachigaki.rs
@@ -1,5 +1,7 @@
 extern mod mecab;
 
+use mecab::IMeCabNode;
+
 fn main() {
     let mecab = mecab::new2("");