contains duplicate

Author: bus710

contains-duplicate/bus710.go

@@ -0,0 +1,14 @@
+package week01
+
+func containsDuplicate(nums []int) bool {
+	dup := make(map[int]bool, 0)
+	for _, n := range nums {
+		if _, ok := dup[n]; !ok {
+			dup[n] = true
+		} else {
+			return true
+		}
+	}
+
+	return false
+}