From 3a03035a5b08e4a7ab07c7fa2af26a5e0b54026a Mon Sep 17 00:00:00 2001
From: gholk <gholk@disroot.org>
Date: Fri, 30 Jun 2023 21:51:59 +0800
Subject: [PATCH] Distinct array or object by keep a empty array literal

Make `{a: [1,2]}` produce `{a: [], 'a.0': 1, 'a.1': 2}`,
so we can distinct array and object.

Add a `opts.useEmptyArray` option to turn on this feature.
---
 index.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/index.js b/index.js
index 42e1ddc..8f923d0 100644
--- a/index.js
+++ b/index.js
@@ -35,6 +35,9 @@ export function flatten (target, opts) {
 
       if (!isarray && !isbuffer && isobject && Object.keys(value).length &&
         (!opts.maxDepth || currentDepth < maxDepth)) {
+        if (opts.useEmptyArray && Array.isArray(value)) {
+          output[newKey] = []
+        }
         return step(value, newKey, currentDepth + 1)
       }