From b8cfe5ae4d4d425fa941ebf8cb9cba1a8b073f3f Mon Sep 17 00:00:00 2001
From: Jo YoHan <whdygks210@gmail.com>
Date: Thu, 15 Aug 2024 14:13:17 +0900
Subject: [PATCH] feat(form): add array collection format in form binding

---
 binding/form_mapping.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/binding/form_mapping.go b/binding/form_mapping.go
index 93d3ca2ab5..4a35866da2 100644
--- a/binding/form_mapping.go
+++ b/binding/form_mapping.go
@@ -202,7 +202,11 @@ func trySplit(vs []string, field reflect.StructField) (newVs []string, err error
 		return vs, fmt.Errorf("%s is not supported in the collection_format. (csv, ssv, pipes)", cfTag)
 	}
 
-	newVs = make([]string, 0)
+	totalLength := 0
+	for _, v := range vs {
+		totalLength += strings.Count(v, sep) + 1
+	}
+	newVs = make([]string, 0, totalLength)
 	for _, v := range vs {
 		newVs = append(newVs, strings.Split(v, sep)...)
 	}