Actually, it is too late here to optimize it, any, the correct function is:
function dec2hex(dec:Number):String {
const carryArr:Array = [];
const hexIntPart:String = dec.toString(16).toUpperCase();
const integerPart:int = parseInt(dec.toString());
const s:String = dec.toString();
const i2:int = s.indexOf(".");
const iterationMax:int = (i2 > -1) ? s.substr(i2 + 1).length : 0;
var fractionalPart:Number = parseFloat((dec -
integerPart).toFixed(iterationMax));
var product:Number;
var hex:String = "0x" + hexIntPart.toString();
if (iterationMax > 0) {
for (var i:uint = 0; i < iterationMax; i++) {
product = fractionalPart * 16;
carryArr[carryArr.length] = product.toString(16).toUpperCase();
const carry:uint = parseInt(product.toString());
fractionalPart = parseFloat((product -
carry).toFixed(iterationMax));
if (fractionalPart == 0)
break;
}
hex += "." + carryArr.join("");
}
return hex;
}
and should be use in the as per the previous example:
dec2hex(parseFloat(scaledVal.text));
Frédéric THOMAS
> From: [email protected]
> To: [email protected]
> Subject: RE: Decimal to Hex conversion.
> Date: Mon, 29 Sep 2014 21:24:01 +0100
>
> Ok, I found the problem in mine for big numbers.
>
> @harbs, your function works for big numbers but not fractional, anyway, I
> didn't optimize mine, so, I will use its recursive pattern to recode mine,
> thanks.
>
> Frédéric THOMAS
>
> > Subject: Re: Decimal to Hex conversion.
> > From: [email protected]
> > Date: Mon, 29 Sep 2014 23:15:35 +0300
> > To: [email protected]
> >
> > I have TOTALLY not read this thread, but does this function do what you
> > want?
> >
> > function toHex(d) {
> > var r = d % 16;
> > var result;
> > if (d-r == 0)
> > result = toChar(r);
> > else
> > result = toHex( (d-r)/16 ) + toChar(r);
> > return result;
> > }
> > function toChar(n) {
> > const alpha = "0123456789abcdef";
> > return alpha.charAt(n);
> > }
> >
> > On Sep 29, 2014, at 11:03 PM, Frédéric THOMAS <[email protected]>
> > wrote:
> >
> > > Also, it seems to work for fractional small numbers, it doesn't on big
> > > one because this function still rely on the toString(radix) method with
> > > on my windows 64 bits return a wrong result, should a bug to be filled on
> > > Adobe or some else first can confirm those results ?
> > >
> > > decimal (10) -> dec2hex -> toString(16) -> real
> > > 14159265359 -> 0x34.34BF53E2D -> 0x4BF53E4F -> 0x34BF53E4F
> > > 3.14159265359 -> 0x3.243F6A8885D -> 0x3.0 -> 0x3.243F6A8885A308D
> > >
> > > In between I'll try to find a way to code the correct function.
> > >
> > > Frédéric THOMAS
> > >
> > >> From: [email protected]
> > >> To: [email protected]
> > >> Subject: RE: Decimal to Hex conversion.
> > >> Date: Mon, 29 Sep 2014 20:34:51 +0100
> > >>
> > >> Actually I wasn't sure of mathematical correctness of the solution I
> > >> gave above and I end up writing my own function for it, so, use it
> > >> instead of the one I gave before:
> > >>
> > >> function dec2hex(dec:Number):String {
> > >> const carryArr:Array = [];
> > >> const integerPart:int = parseInt(dec.toString(16));
> > >> const s:String = dec.toString();
> > >> const iterationMax:int = s.substr(s.indexOf(".") + 1).length;
> > >> var fractionalPart:Number = parseFloat((dec -
> > >> integerPart).toFixed(iterationMax));
> > >> var product:Number;
> > >>
> > >> var hex:String = "0x" + integerPart.toString();
> > >>
> > >> if (iterationMax > 0) {
> > >> for (var i:uint = 0; i < iterationMax; i++) {
> > >> product = fractionalPart * 16;
> > >> carryArr[carryArr.length] =
> > >> product.toString(16).toUpperCase();
> > >> const carry:uint = parseInt(product.toString());
> > >> fractionalPart = parseFloat((product -
> > >> carry).toFixed(iterationMax));
> > >> if (fractionalPart == 0)
> > >> break;
> > >> }
> > >> hex += "." + carryArr.join("");
> > >> }
> > >>
> > >> return hex;
> > >> }
> > >>
> > >> You could probably optimize it but at least it returns the correct
> > >> result.
> > >>
> > >> Frédéric THOMAS
> > >>
> > >>> From: [email protected]
> > >>> To: [email protected]
> > >>> Subject: RE: Decimal to Hex conversion.
> > >>> Date: Mon, 29 Sep 2014 13:24:21 +0100
> > >>>
> > >>> And to be sure the user is allowed to type decimals only, I would add
> > >>> on key down listener a check for it like this:
> > >>>
> > >>>
> > >>>
> > >>> if( isNaN(Number(scaledVal.text)) ){
> > >>>
> > >>> scaledVal.text =
> > >>> scaledVal.substring(0, str.length-1);
> > >>>
> > >>> }
> > >>>
> > >>> Or use a preventDefault()
> > >>>
> > >>> and to optimize a bit, on change, check the event is of type CHANGE
> > >>> before computing.
> > >>>
> > >>> HTH,
> > >>> Frédéric THOMAS
> > >>>
> > >>>> From: [email protected]
> > >>>> Date: Mon, 29 Sep 2014 17:42:33 +0530
> > >>>> Subject: Re: Decimal to Hex conversion.
> > >>>> To: [email protected]
> > >>>>
> > >>>> Thanks Frederic. It Worked.
> > >>>>
> > >>>> --
> > >>>> Regards
> > >>>> Saju Thankathurai,
> > >>>>
> > >>>>
> > >>>> On Mon, Sep 29, 2014 at 5:27 PM, Frédéric THOMAS
> > >>>> <[email protected]>
> > >>>> wrote:
> > >>>>
> > >>>>>
> > >>>>> hexVal.text ="0x" + scaledVal.text.split(".").map(function (item:*,
> > >>>>> index:int, array:Array):String {
> > >>>>> return int(item).toString(16).toUpperCase();
> > >>>>> }).join(".");
> > >>>>>
> > >>>>> Frédéric THOMAS
> > >>>>>
> > >>>>>> From: [email protected]
> > >>>>>> To: [email protected]
> > >>>>>> Subject: RE: Decimal to Hex conversion.
> > >>>>>> Date: Mon, 29 Sep 2014 12:49:59 +0100
> > >>>>>>
> > >>>>>> so int is the same!
> > >>>>>> if uint is just half of int...
> > >>>>>> lets say you should first read the different types but for your try
> > >>>>>> use
> > >>>>> number
> > >>>>>>
> > >>>>>>> From: [email protected]
> > >>>>>>> Date: Mon, 29 Sep 2014 17:16:51 +0530
> > >>>>>>> Subject: Re: Decimal to Hex conversion.
> > >>>>>>> To: [email protected]
> > >>>>>>>
> > >>>>>>> Hi,
> > >>>>>>>
> > >>>>>>> I tried using int, it didnt help. Below is the demo code,
> > >>>>>>>
> > >>>>>>> <?xml version="1.0" encoding="utf-8"?>
> > >>>>>>> <s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009";
> > >>>>>>> xmlns:s="library://ns.adobe.com/flex/spark"
> > >>>>>>> xmlns:mx="library://ns.adobe.com/flex/mx"
> > >>>>>>> initialize="windowedapplication1_initializeHandler(event)" >
> > >>>>>>> <fx:Script>
> > >>>>>>> <![CDATA[
> > >>>>>>> import mx.events.FlexEvent;
> > >>>>>>> import spark.events.TextOperationEvent;
> > >>>>>>> protected function
> > >>>>> scaledVal_changeHandler(event:TextOperationEvent):void
> > >>>>>>> {
> > >>>>>>> hexVal.text = int(scaledVal.text).toString(16).toUpperCase();
> > >>>>>>> }
> > >>>>>>> protected function
> > >>>>>>> hexVal_changeHandler(event:TextOperationEvent):void
> > >>>>>>> {
> > >>>>>>> var texts:String = "0x"+hexVal.text;
> > >>>>>>> scaledVal.text = int(texts).toString(10);
> > >>>>>>> }
> > >>>>>>> protected function
> > >>>>>>> windowedapplication1_initializeHandler(event:FlexEvent):void
> > >>>>>>> {
> > >>>>>>> nativeWindow.maximize();
> > >>>>>>> }
> > >>>>>>> protected function button1_clickHandler(event:MouseEvent):void
> > >>>>>>> {
> > >>>>>>> scaledVal.text = "";
> > >>>>>>> hexVal.text = "";
> > >>>>>>> }
> > >>>>>>> ]]>
> > >>>>>>> </fx:Script>
> > >>>>>>> <fx:Declarations>
> > >>>>>>> <!-- Place non-visual elements (e.g., services, value objects) here
> > >>>>>>> -->
> > >>>>>>> </fx:Declarations>
> > >>>>>>> <s:BorderContainer width="100%" height="100%" borderVisible="true">
> > >>>>>>> <s:VGroup verticalCenter="0" horizontalCenter="0">
> > >>>>>>> <s:Label width="100%" color="blue"
> > >>>>>>> text="Demo to convert hexa to scaled value and vice-versa"/>
> > >>>>>>> <mx:Form width="100%" height="100%">
> > >>>>>>> <mx:FormHeading label="Enter values into the textbox"/>
> > >>>>>>> <mx:FormItem label="Enter Scaled value">
> > >>>>>>> <s:TextInput id="scaledVal" width="200"
> > >>>>>>> change="scaledVal_changeHandler(event)"/>
> > >>>>>>> </mx:FormItem>
> > >>>>>>> <mx:FormItem label="Enter Hexa value">
> > >>>>>>> <s:TextInput id="hexVal" width="200"
> > >>>>> change="hexVal_changeHandler(event)"/>
> > >>>>>>> </mx:FormItem>
> > >>>>>>> </mx:Form>
> > >>>>>>> <s:Button label="Reset" click="button1_clickHandler(event)"/>
> > >>>>>>> </s:VGroup>
> > >>>>>>> </s:BorderContainer>
> > >>>>>>> </s:WindowedApplication>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> --
> > >>>>>>> Regards
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> Saju Thankathurai,
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> *"We **cannot do great things on this Earth, only small things with
> > >>>>> great
> > >>>>>>> love"*
> > >>>>>>> *-Mother Teresa (1910-1997)*
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> On Mon, Sep 29, 2014 at 5:06 PM, Evyatar Ben Halevi-Arbib <
> > >>>>>>> [email protected]> wrote:
> > >>>>>>>
> > >>>>>>>> You convert initially using uint, so decimals are omitted.
> > >>>>>>>>
> > >>>>>>>> Regards,
> > >>>>>>>> Evyatar
> > >>>>>>>>
> > >>>>>>>> On Mon, Sep 29, 2014 at 2:22 PM, Saju Thankathurai <
> > >>>>>>>> [email protected]>
> > >>>>>>>> wrote:
> > >>>>>>>>
> > >>>>>>>>> Hi,
> > >>>>>>>>>
> > >>>>>>>>> How can we convert a decimal value to Hex value?
> > >>>>>>>>>
> > >>>>>>>>> I need to convert *1345.4567 *value to HEX value. I used the below
> > >>>>> code
> > >>>>>>>> to
> > >>>>>>>>> convert decimal values to Hex,
> > >>>>>>>>>
> > >>>>>>>>> hexVal.text = uint(scaledVal.text).toString(16).toUpperCase();
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>> Below code to convert from Hex to decimal.
> > >>>>>>>>> var texts:String = "0x"+hexVal.text;
> > >>>>>>>>> scaledVal.text = uint(texts).toString(10);
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>> The value 1345 is converted to HEX without any issues. But after
> > >>>>> the
> > >>>>>>>>> decimal part, it is not converting.
> > >>>>>>>>>
> > >>>>>>>>> Could some one give inputs on this conversion.
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>> --
> > >>>>>>>>> Regards
> > >>>>>>>>> Saju Thankathurai,
> > >>>>>>>>>
> > >>>>>>>>
> > >>>>>>
> > >>>>>
> > >>>>>
> > >>>
> > >>
> > >
> >
>
