Update README.md

README.md

@@ -25,6 +25,23 @@ Here is a recipe for Mai Tai:\n\n1:
 > 3 parts rum, 2: 3 parts pineapple juice, 3: half a cup of lime juice, 4: 6 to 8 fresh or frozen pineapple chunks, 5: crushed ice.
 > Mix all ingredients except ice and pour into glasses with ice. Garnish with a pineapple slice.
 
+Here is an implementation of 2-sum in golang:\n\n```go
+> func twoSum(nums []int, target int) []int {
+>   if len(nums) <= 1 { return nil }
+>   m := map[int] bool{}
+>   for i := range(nums) {{
+>     n = nums[i]\n\n // find the complement of current number in map
+>     comp = target - n
+>     if comp in m { return [m[comp], i+1 ] }
+>     else { m[n] = true }
+>   }}
+>   return nil
+> }
+> ```
+
+
+# Output should be [2,3] because that' is the position of where 4+4 =8 exists in our list
+
 ## Merge Details
 ### Merge Method