lib/path: add method Set to Route

The Set method set or replace the key's value in path with parameter val.
If the key exist it will return true; otherwise it will return false.

This changes remove unnecessary field key in routeNode and optimize
the String method using [strings.Builder].

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/path/route_node.go b/lib/path/route_node.go
index dd1b06b0..b89ab24e 100644
--- a/lib/path/route_node.go
+++ b/lib/path/route_node.go
@@ -10,7 +10,7 @@ package path
 // A sub-path that start with colon ":" is a key; otherwise its normal
 // sub-path.
 type routeNode struct {
-	key   string
 	name  string
+	val   string
 	isKey bool
 }