From 4835a3d8323827e8c9b79dfd064c7f42cd8b086e Mon Sep 17 00:00:00 2001
From: Ziyang Hu <hu.ziyang@cantab.net>
Date: Fri, 22 Apr 2022 01:12:01 +0800
Subject: [PATCH] nice way of writing the comparison

---
 src/lib.rs                |  2 +-
 src/relation/key_order.rs | 19 ++++---------------
 2 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 4f1c9c06..9fb953fb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -18,7 +18,7 @@ mod tests {
     #[test]
     fn import() {
         use cozorocks::*;
-        let _o = Options::default();
+        let _o = OptionsPtr::default();
         println!("Hello");
     }
 }
\ No newline at end of file
diff --git a/src/relation/key_order.rs b/src/relation/key_order.rs
index 47b58fe4..91580e7d 100644
--- a/src/relation/key_order.rs
+++ b/src/relation/key_order.rs
@@ -9,21 +9,10 @@ pub fn compare(a: &[u8], b: &[u8]) -> i8 {
         Ordering::Greater => return 1,
         Ordering::Equal => {}
     }
-    let mut ia = ta.iter();
-    let mut ib = tb.iter();
-    loop {
-        match (ia.next(), ib.next()) {
-            (None, None) => return 0,
-            (None, Some(_)) => return -1,
-            (Some(_), None) => return 1,
-            (Some(va), Some(vb)) => {
-                match va.cmp(&vb) {
-                    Ordering::Less => return -1,
-                    Ordering::Greater => return 1,
-                    Ordering::Equal => {}
-                }
-            }
-        }
+    match ta.iter().cmp(tb.iter()) {
+        Ordering::Less => -1,
+        Ordering::Equal => 0,
+        Ordering::Greater => 1
     }
 }