1 files changed, 10 insertions, 0 deletions
diff --git a/src/lib/strings.go b/src/lib/strings.go
index 06a923427..5ce4a8dae 100644
--- a/src/lib/strings.go
+++ b/src/lib/strings.go
@@ -107,3 +107,13 @@ func Join(a []string, sep string) string {
 	}
 	return string(b)
 }
+
+// HasPrefix tests whether the string s begins with prefix.
+func HasPrefix(s, prefix string) bool {
+	return len(s) >= len(prefix) && s[0:len(prefix)] == prefix
+}
+
+// HasSuffix tests whether the string s ends with suffix.
+func HasSuffix(s, suffix string) bool {
+	return len(s) >= len(suffix) && s[len(s)-len(suffix):len(s)] == suffix
+}