From 620fb491c2f73e04f9a18641c61820463d468cce Mon Sep 17 00:00:00 2001
From: Liang Ma <lma@pinterest.com>
Date: Wed, 11 Dec 2019 13:00:22 -0800
Subject: [PATCH] array subscript

---
 Sources/URLEncodedForm/Data/URLEncodedFormSerializer.swift | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Sources/URLEncodedForm/Data/URLEncodedFormSerializer.swift b/Sources/URLEncodedForm/Data/URLEncodedFormSerializer.swift
index 3fc037e..9129bdb 100644
--- a/Sources/URLEncodedForm/Data/URLEncodedFormSerializer.swift
+++ b/Sources/URLEncodedForm/Data/URLEncodedFormSerializer.swift
@@ -41,8 +41,10 @@ final class URLEncodedFormSerializer {
 
     /// Serializes a `[URLEncodedFormData]` at a given key.
     private func serialize(_ array: [URLEncodedFormData], forKey key: Data) throws -> Data {
+        var i:UInt8 = 0
         let collection = try array.map { value -> Data in
-            let keyPath = key + [.leftSquareBracket, .rightSquareBracket]
+            let keyPath = key + [.leftSquareBracket, i+Character("0").asciiValue!, .rightSquareBracket]
+            i = i+1
             return try serialize(value, forKey: keyPath)
         }