add single_number (#1)

* init single-number.rs

* fix path

* minor

* add LICENSE.md

* update ignore

* update

* add resource

* update readme

* fix

Author: ChrisLinn

.gitignore

@@ -1 +1,8 @@
-kamyu104/target/
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+# Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+**/target/

LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2019 https://github.com/rust-interview
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -10,6 +10,11 @@ cargo test
 
 * [Bit Manipulation](https://github.com/rust-interview/rust-leetcode-solutions#bit-manipulation)
 
+
+
@@ -1 +1,2 @@
@@ -1 +1,2 @@
-mod example;
+mod example;
+mod single_number;
@@ -0,0 +1,18 @@
+// 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)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[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);
+    }
+}

kamyu104/src/single_number.rs

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

@@ -0,0 +1,18 @@
+// 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)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[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);
+    }
+}