Archive for March, 2006

Flash 8 example for Flashamp 3

I recently produced a little flash 8 example for marmalade media, to show off some of the features of the latest release of flashamp. You can view it here, under “FlashAmp examples with Flash source code”

I’ll be releasing the source code via the examples pages in the not too distant future, but for now just enjoy the show.

flashamp example

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New surfboard

Awesome stuff. Now all i need is some good waves…

And to be good at surfing.

My ride!!

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Flash decimal to fraction utility class

I recently had to do some work where i had to return a fraction from a decimal number. I did some hunting around on the net and found some great information at layer51 and ericlin. From the info i got there i made a utility class that handles decimal to fraction conversion. You can download the source here, or just copy and paste from below.

The documentation is in the code comments, but if there’s demand for it, i’ll create a bit of html documentation. The class itself is pretty straightforward, so hopefully you should see how to use it. Any useful additions to this class would be appreciated.

Enjoy!

/**
* Utility class for getting fractions from decimals as an array of values or a string
*
* @author Phil Douglas
* @version 1.0
*
* website : http://www.lookmumimontheinternet.com
* email : phil@lookmumimontheinternet.com
*
* based on information from:
*
* http://proto.layer51.com/d.aspx?f=289
* http://ericlin2.tripod.com/mis/ration.html
*
*/
class com.lookmum.util.Fraction
{
// class variable, limits the amount of iterations in finding the fraction to prevent infinite loops
public static var iterationLimit : Number = 10000
private static var it : Number = 0
// class variable, the accuracy to which to find the fraction (used for infinately recurring decimals e.g. 1/3)
public static var accuracy : Number = 0.00001
private function Fraction ()
{
//class is static utility class so no need to instantiate
}
private static function resetIt () : Void
{
it = 0
}
private static function addIt () : Boolean
{
it ++
if (it == iterationLimit)
{
trace ('error : too many iterations')
return true
}
}
/**
* Static class method, returns a fraction from a decimal as a string
*
* @usage com.lookmum.util.Fraction.getFractionString(0.5) // returns "1/2"
* com.lookmum.util.Fraction.getFractionString(1.5) // returns "1 1/2"
* com.lookmum.util.Fraction.getFractionString(1) // returns "1"
* @param num the decimal to find the corresponding fraction for
*
* @return a string of the fraction
*
*/
public static function getFractionString (num : Number) : String
{
var fracString : String
var fracArray : Array = getFraction (num)
switch (fracArray.length)
{
case 1 :
fracString = num.toString ()
break
case 2 :
fracString = fracArray [0].toString () + '/' + fracArray [1].toString ()
break
case 3 :
fracString = fracArray [0].toString () + ' ' + fracArray [1].toString () + '/' + fracArray [2].toString ()
break
}
return fracString
}
/**
* Static class method, returns a fraction from a decimal as an array
*
* @usage com.lookmum.util.Fraction.getFraction(0.5) // returns [1,2]
* com.lookmum.util.Fraction.getFraction(1.5) // returns [1,1,2]
* com.lookmum.util.Fraction.getFraction(1) // returns [1]
*
* @param num the decimal to find the corresponding fraction for
*
* @return an array of the fraction of length 1-3
*
*/
public static function getFraction (num : Number) : Array
{
var fracArray : Array = new Array ()
var hasWhole : Boolean = false
if (num >= 1)
{
hasWhole = true
fracArray.push (Math.floor (num))
}
if (num - Math.floor (num) == 0)
{
return fracArray
}
if (hasWhole)
{
num = num - Math.floor (num)
}
var a : Number = num - int (num);
var p : Number = 0;
var q : Number = a;
resetIt ()
while (Math.abs (q - Math.round (q)) > accuracy)
{
addIt ()
p ++;
q = p / a;
}
fracArray.push (Math.round (q * num))
fracArray.push (Math.round (q))
return fracArray
}
}

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Blog upgraded

I’ve just upgraded the blog to use the latest release of WordPress. It was a pretty painless experience, and the tutorials on the wordpress site are great.

The release includes a shiny new admin interface, and a load of technical things which i’m assured fix a lot of security issues. The best thing has to be the new preview pane, that lets you view your entry as it will appear in your wordpress template, rather than just formatted as the rest of the admin interface.

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