util: use ES2015+ Object.is to check negative zero

Use `Object.is` to check whether the value is negative zero or not. Ref: b3e4fc6 PR-URL: #11332 Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Evan Lucas <[email protected]> Reviewed-By: Joyee Cheung <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Sakthipriyan Vairamani <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>
nodejs · Mar 9, 2017 · e54b433 · e54b433
1 parent e7b7d72
commit e54b433
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/lib/util.js b/lib/util.js
@@ -598,9 +598,8 @@ 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');
 }