refactor (#2)

* init single-number.rs

* fix path

* minor

* add LICENSE.md

* update ignore

* update

* add resource

* update readme

* fix

* refactor

Author: ChrisLinn

kamyu104/src/example.rs

@@ -1,2 +1,2 @@
-mod example;
-mod single_number;
+mod template;
+mod single_number;

kamyu104/src/main.rs

@@ -1,9 +1,12 @@
 // Time:  O(n)
 // Space: O(1)
 
-#[allow(dead_code)]
-pub fn single_number(nums: Vec<i32>) -> i32 {
-    nums.iter().fold(0, |acc, &x| acc ^ x)
+pub struct Solution {}
+
+impl Solution {
+    pub fn single_number(nums: Vec<i32>) -> i32 {
+        nums.iter().fold(0, |acc, &num| acc ^ num)
+    }
 }
 
 #[cfg(test)]
@@ -12,7 +15,7 @@ mod tests {
 
     #[test]
     fn test_single_number() {
-        assert_eq!(single_number(vec![2,2,1]), 1);
-        assert_eq!(single_number(vec![4,1,2,1,2]), 4);
+        assert_eq!(Solution::single_number(vec![2, 2, 1]), 1);
+        assert_eq!(Solution::single_number(vec![4, 1, 2, 1, 2]), 4);
     }
-}
+}

kamyu104/src/single_number.rs

@@ -0,0 +1,21 @@
+pub struct Solution {}
+
+impl Solution {
+    pub fn add(a: i32, b: i32) -> i32 {
+        // only print when a test fails
+        println!("{}", a + b);
+        return a + b;
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    use super::*;
+
+    #[test]
+    fn test_add() {
+        assert_eq!(Solution::add(1, 2), 3);
+        assert_ne!(Solution::add(1, 2), 4);
+    }
+}