1 files changed, 9 insertions, 0 deletions
diff --git a/util/common/stringUtil.go b/util/common/stringUtil.go
new file mode 100644
index 00000000..5f1f93fd
--- /dev/null
+++ b/util/common/stringUtil.go
@@ -0,0 +1,9 @@
+package common
+
+import "sort"
+
+func IsSubString(target string, str_array []string) bool {
+	sort.Strings(str_array)
+	index := sort.SearchStrings(str_array, target)
+	return index < len(str_array) && str_array[index] == target
+}