Comments on: Rounding numbers in Flex using the NumberFormatter class http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/ Just a bunch of Adobe Flex Examples Sun, 12 Feb 2012 19:26:49 +0000 hourly 1 By: ejiro http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-10366 ejiro Sun, 05 Feb 2012 05:48:02 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-10366 How can I zerofill an output result, integer ? How can I zerofill an output result, integer ?

]]> By: Al http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-9580 Al Fri, 09 Sep 2011 21:33:20 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-9580 So, given a NumberFormatter with these settings: decimalSeparatorTo="." rounding="nearest" precision="2" useThousandsSeparator="false" Why do these numbers round to .51 as intended: [Bindable] private var numString1:String = "5.5050"; [Bindable] private var numString2:String = "85.5050"; [Bindable] private var numString3:String = "485.5050"; But this number rounds incorrectly to .50 ??? [Bindable] private var numString4:String = "8485.5050"; More importantly, how does one work around this, when the popular *1000 / 1000 trick doesn't seem to work? So, given a NumberFormatter with these settings:
decimalSeparatorTo=”.”
rounding=”nearest”
precision=”2″
useThousandsSeparator=”false”

Why do these numbers round to .51 as intended:
[Bindable]
private var numString1:String = “5.5050″;
[Bindable]
private var numString2:String = “85.5050″;
[Bindable]
private var numString3:String = “485.5050″;

But this number rounds incorrectly to .50 ???
[Bindable]
private var numString4:String = “8485.5050″;

More importantly, how does one work around this, when the popular *1000 / 1000 trick doesn’t seem to work?

]]> By: Muhammad Imran http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-9213 Muhammad Imran Thu, 12 May 2011 06:43:19 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-9213 I am looking a textInput Field in which I can restrict first three numaric values and further three alphabet in maxChar 6. Please send me a solution. Thanks In Advance. M.Imran 0092-321-602-8608 I am looking a textInput Field in which I can restrict first three numaric values and further three alphabet in maxChar 6.
Please send me a solution.

Thanks In Advance.
M.Imran
0092-321-602-8608

]]> By: Peter deHaan http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-7697 Peter deHaan Thu, 13 May 2010 17:27:36 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-7697 @Molaro, I don't think this is an Adobe bug. My understanding is that it is just an unforunate side effect of floating point math. That said, I found the following bugs filed against Flash Player on similar topics: http://bugs.adobe.com/jira/browse/FP-3042 http://bugs.adobe.com/jira/browse/FP-3044 http://bugs.adobe.com/jira/browse/FP-3738 http://bugs.adobe.com/jira/browse/FP-4407 As well as the following helpful links: http://kb2.adobe.com/cps/139/tn_13989.html http://en.wikipedia.org/wiki/Floating_point#Accuracy_problems Peter @Molaro,

I don’t think this is an Adobe bug. My understanding is that it is just an unforunate side effect of floating point math.
That said, I found the following bugs filed against Flash Player on similar topics:
http://bugs.adobe.com/jira/browse/FP-3042
http://bugs.adobe.com/jira/browse/FP-3044
http://bugs.adobe.com/jira/browse/FP-3738
http://bugs.adobe.com/jira/browse/FP-4407

As well as the following helpful links:
http://kb2.adobe.com/cps/139/tn_13989.html
http://en.wikipedia.org/wiki/Floating_point#Accuracy_problems

Peter

]]> By: Molaro http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-7694 Molaro Thu, 13 May 2010 14:53:37 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-7694 Peter, thanks for the reply. I have seen that before and usually if I trace out the division of the 2 numbers I use to get that number (17.76), I can see that longer value. But in this case I have littler just keyed in the number into my own test code as well as your demo and see the same issue. I'll keep looking. I logged this as a possible bug with Adobe hoping they can provide an explanation if it isn't a bug. Honestly, given that it 17.76, the year of our independence, I sort of assumed some odd developer bug/Easter egg! Peter, thanks for the reply. I have seen that before and usually if I trace out the division of the 2 numbers I use to get that number (17.76), I can see that longer value. But in this case I have littler just keyed in the number into my own test code as well as your demo and see the same issue. I’ll keep looking.

I logged this as a possible bug with Adobe hoping they can provide an explanation if it isn’t a bug.

Honestly, given that it 17.76, the year of our independence, I sort of assumed some odd developer bug/Easter egg!

]]> By: Peter deHaan http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-7655 Peter deHaan Thu, 06 May 2010 19:13:21 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-7655 @Molaro, This is just a guess, but sometimes JavaScript/ActionScript and many other languages store seemingly simple values like "17.76" internally as "17.760000000000005". So this may be an artifact of the floating point math. So your value of 17.76 has that trailing "0000000000005" which is causing it to get rounded up. But again, this is just a guess and I could be very wrong. But for a bit more info on my theory, see http://stackoverflow.com/questions/588004/is-javascripts-math-broken Peter @Molaro,

This is just a guess, but sometimes JavaScript/ActionScript and many other languages store seemingly simple values like “17.76″ internally as “17.760000000000005″. So this may be an artifact of the floating point math. So your value of 17.76 has that trailing “0000000000005″ which is causing it to get rounded up.

But again, this is just a guess and I could be very wrong. But for a bit more info on my theory, see http://stackoverflow.com/questions/588004/is-javascripts-math-broken

Peter

]]> By: Molaro http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-7654 Molaro Thu, 06 May 2010 18:35:04 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-7654 So, I am having a rounding issue and this app is helping me sort of confirm the issue. Can you explain why if I put it: 45.68 the rounding UP value is 45.68 (and not 45.69) If I put in 17.76 (my problem number in my personal app), the round UP is 17.77 (and not 17.76 like the first example) Overall, with a precision of 2, and rounding up, all my numbers in my app round like the first example, 45.68, however 17.76 actually rounds up. Can you explain this??? (Flex 3.5) So, I am having a rounding issue and this app is helping me sort of confirm the issue. Can you explain why if I put it:
45.68 the rounding UP value is 45.68 (and not 45.69)

If I put in 17.76 (my problem number in my personal app), the round UP is 17.77 (and not 17.76 like the first example)

Overall, with a precision of 2, and rounding up, all my numbers in my app round like the first example, 45.68, however 17.76 actually rounds up. Can you explain this??? (Flex 3.5)

]]> By: HervĂ© http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-2120 HervĂ© Wed, 01 Apr 2009 13:46:39 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-2120 restrict="[0-9.-]" would be : restrict="[0-9.\-]" in mxml and restrict="[0-9.\\-]" in actionscript restrict=”[0-9.-]”

would be :

restrict=”[0-9.\-]” in mxml
and
restrict=”[0-9.\\-]” in actionscript

]]> By: Lucas http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/comment-page-1/#comment-2121 Lucas Sat, 13 Dec 2008 11:57:00 +0000 http://blog.flexexamples.com/2007/12/13/rounding-numbers-in-flex-using-the-numberformatter-class/#comment-2121 Very good, thank's! Very good, thank’s!

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