From 5ddf72290b3035832fcdb4bbbc8f4b10931ebecf Mon Sep 17 00:00:00 2001
From: Shinnosuke Watanabe <snnskwtnb@gmail.com>
Date: Mon, 13 Feb 2017 17:15:26 +0900
Subject: [PATCH] util: use ES2015+ Object.is to check negative zero
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Use `Object.is` to check whether the value is negative zero or not.

Ref: https://github.com/nodejs/node/commit/b3e4fc6a48b97b52bd19de43c76b7082dcab4988
PR-URL: https://github.com/nodejs/node/pull/11332
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
---
 lib/util.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/util.js b/lib/util.js
index b16692cccfb..dec2e6b3903 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -561,9 +561,8 @@ function formatValue(ctx, value, recurseTimes) {
 
 
 function formatNumber(ctx, value) {
-  // Format -0 as '-0'. Strict equality won't distinguish 0 from -0,
-  // so instead we use the fact that 1 / -0 < 0 whereas 1 / 0 > 0 .
-  if (value === 0 && 1 / value < 0)
+  // Format -0 as '-0'. Strict equality won't distinguish 0 from -0.
+  if (Object.is(value, -0))
     return ctx.stylize('-0', 'number');
   return ctx.stylize('' + value, 'number');
 }