Bug 31777

Summary: Number.toFixed returns wrong values
Product: WebKit Reporter: bugzilla33 <bugzilla33>
Component: WebCore JavaScriptAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Major CC: barraclough
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: PC   
OS: Windows 7   
URL: http://pc44.one.pl/goorol/bugs/chrome/Number.toFixed.html
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bugzilla33
Reported 2009-11-21 16:50:01 PST
Created attachment 43667 [details] source Number.toFixed returns sometimes wrong values (incorect rounding). Please run attachment. Actual Results: ( 0.95 ) . toFixed ( 1 ) = 0.9 THOUGH ( 9.5 ) . toFixed ( 0 ) = 10 Expected Results: ( 0.95 ) . toFixed ( 1 ) = 1.0 LIKE ( 9.5 ) . toFixed ( 0 ) = 10
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source (1.48 KB, text/html)
2009-11-21 16:50 PST, bugzilla33 		no flags
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Alexey Proskuryakov
Comment 1 2009-11-21 22:55:08 PST
Duplicate of bug 24711?
bugzilla33
Comment 2 2009-11-22 01:06:09 PST
toFixed rounds, not floors ! bug 24711 is not a Bug !! (1.95) . toFixed( 1 ) = 2.0 because: Math.round ( 1.95 * 10 ) / 10 equal 2
bugzilla33
Comment 3 2009-11-22 01:14:34 PST
All browsers before returns string value (IE, Opera, Konqueror, Chrome, Firefox) rounding a Number.
Gavin Barraclough
Comment 4 2010-08-27 12:56:54 PDT
yep, this is a dupe. ieee754(.95) < decimal(.95), hence rounds up to 0.9 (ecma-262 15.7.4.5 requires we select the nearest value). ieee754(9.5) == decimal(9.5), hence rounds up to 10 (ecma-262 15.7.4.5 requires we select the larger to two equally near values). *** This bug has been marked as a duplicate of bug 24711 ***
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