Merge pull request #539 from diss1993/ticket/704

Swift | 704. Binary Search

Author: Ahmad-A0

swift/704-Binary-Search

@@ -0,0 +1,13 @@
+class Solution {
+    func search(_ nums: [Int], _ target: Int) -> Int {
+        var l = 0
+        var r = nums.count - 1
+        while l <= r {
+            let mid = (l + r) / 2
+            guard nums[mid] != target else { return mid }
+            l = nums[mid] < target ? mid + 1 : l
+            r = nums[mid] > target ? mid - 1 : r
+        }
+        return -1
+    }
+}