### Re: [Flashcoders] problem with adding two digits

```I wrote the functions below in literally just a few min, so, even though
they do seem to work for me, I wouldn't necessarily say they are

Also, I would only use these if you will know that the numbers past the
mantissa are of small amounts.

Oh yeah, and please tell me if I screwed up somewhere, or if you think
you can do it better :)

function floatProduct(... nums){
var ml:int = 0; //max length past mantissa
var ln:uint = nums.length;
var rsl:int; //right side length
var p:Number = 1;
var s:String;
for (var i:uint = 0; i ln; ++i) {
s = nums[i].toString();
rsl = s.length - s.indexOf('.');
ml += rsl;
p *= nums[i];
}
return Number(p.toFixed(ml));
}
function floatSum(... nums){
var ml:int = 0; //max length past mantissa
var ln:uint = nums.length;
var rsl:int; //right side length
var p:Number = 0;
var s:String;
for (var i:int = 0; i ln; ++i) {
s = nums[i].toString();
rsl = s.length - s.indexOf('.');
if (rsl  ml) {
ml = rsl;
}
p += nums[i];
}
return Number(p.toFixed(ml));
}

-

On 12/14/2010 12:05 PM, Kerry Thompson wrote:

trace (0.27 + 0.03);   // output --  0.30004

Can anyone tell me why I get this weird result in output window?

As people have said, it's a problem with decimals. It's not a problem with
Flash--it's a problem with binary numbers.

Integers are accurate because all integers are a multiple of 1, and binary
does just fine with combining 0's and 1's, the only possibile values of a
digit in the binary system.

If you think of decimals as fractions, maybe it will help you understand the
issue. In binary, a digit can only be a multiple of 2: 1/2, 1/4, 1/8/ 1/16,
1/32, and so on. You can create numbers that aren't multiples of two by
adding multiple digits. For example, 1/4 + 1/8 = 3/8, or .375.

This works pretty well, until you get numbers with a lot of decimal places.
At some point, you will find a decimal that is impossible to make using
powers of 2.

Cordially,

Kerry Thompson
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### Re: [Flashcoders] problem with adding two digits

```
Oh yeah, I forgot to give some examples to test it with, so...

trace(floatSum(-0.1,0.9155,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1));
//vs
trace(-0.1+0.9155+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1);
//and
trace(floatProduct(2.1,0.1,1.0001,.0001));
//vs
trace(2.1*0.1*1.0001*.0001);

On 12/15/2010 2:25 PM, Anthony Pace wrote:
I wrote the functions below in literally just a few min, so, even
though they do seem to work for me, I wouldn't necessarily say they

Also, I would only use these if you will know that the numbers past
the mantissa are of small amounts.

Oh yeah, and please tell me if I screwed up somewhere, or if you think
you can do it better :)

function floatProduct(... nums){
var ml:int = 0; //max length past mantissa
var ln:uint = nums.length;
var rsl:int; //right side length
var p:Number = 1;
var s:String;
for (var i:uint = 0; i ln; ++i) {
s = nums[i].toString();
rsl = s.length - s.indexOf('.');
ml += rsl;
p *= nums[i];
}
return Number(p.toFixed(ml));
}
function floatSum(... nums){
var ml:int = 0; //max length past mantissa
var ln:uint = nums.length;
var rsl:int; //right side length
var p:Number = 0;
var s:String;
for (var i:int = 0; i ln; ++i) {
s = nums[i].toString();
rsl = s.length - s.indexOf('.');
if (rsl  ml) {
ml = rsl;
}
p += nums[i];
}
return Number(p.toFixed(ml));
}

-

On 12/14/2010 12:05 PM, Kerry Thompson wrote:

trace (0.27 + 0.03);   // output --  0.30004

Can anyone tell me why I get this weird result in output window?

As people have said, it's a problem with decimals. It's not a problem
with

Flash--it's a problem with binary numbers.

Integers are accurate because all integers are a multiple of 1, and
binary
does just fine with combining 0's and 1's, the only possibile values
of a

digit in the binary system.

If you think of decimals as fractions, maybe it will help you
understand the
issue. In binary, a digit can only be a multiple of 2: 1/2, 1/4, 1/8/
1/16,

1/32, and so on. You can create numbers that aren't multiples of two by
adding multiple digits. For example, 1/4 + 1/8 = 3/8, or .375.

This works pretty well, until you get numbers with a lot of decimal
places.

At some point, you will find a decimal that is impossible to make using
powers of 2.

Cordially,

Kerry Thompson
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```

### [Flashcoders] My first code.

```  HELLO FlashCoders!

I am trying to write a ToggleButton Class.I can get it to work as a
document class and as as3 on timeline.  But how to I use it as a symbol class?
Thx!
/

package
{

import flash.display.MovieClip;
import flash.events.MouseEvent;

public class ToggleButton extends MovieClip
{
public var toggleButton:MovieClip;

public function ToggleButton()
{
// constructor code

//event listeners
rolloverToggle);
rolloutToggle);
toggleClick);
toggleButton.buttonState = off;

// Respond to mouse events
function rolloverToggle(event:MouseEvent)
{

toggleButton.gotoAndStop(toggleButton.buttonState+ over);

} //rollover f(x)

function rolloutToggle(event:MouseEvent)
{

toggleButton.gotoAndStop(toggleButton.buttonState);

} //rollout f(x)

function toggleClick(event:MouseEvent)
{
if (toggleButton.buttonState == on)
{
toggleButton.buttonState = off;
} //if
else
{
toggleButton.buttonState = on;
} //else

toggleButton.gotoAndStop(toggleButton.buttonState+ over);

} //toggle click f(x)

} //constructor f(x)

} //class

} //package

/
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### Re: [Flashcoders] My first code.

```
On 15/12/2010 23:53, spyder spyders wrote:

HELLO FlashCoders!

I am trying to write a ToggleButton Class.I can get it to work as a
document class and as as3 on timeline.  But how to I use it as a symbol class?

Everywhere you have toggleButton replace it with this or remove it
altogether.

In the linkage for the MovieClip that represents the toggle, put this class.

Paul

Thx!
/

package
{

import flash.display.MovieClip;
import flash.events.MouseEvent;

public class ToggleButton extends MovieClip
{
public var toggleButton:MovieClip;

public function ToggleButton()
{
// constructor code

//event listeners
rolloverToggle);
rolloutToggle);
toggleClick);
toggleButton.buttonState = off;

// Respond to mouse events
function rolloverToggle(event:MouseEvent)
{
toggleButton.gotoAndStop(toggleButton.buttonState+
over);

} //rollover f(x)

function rolloutToggle(event:MouseEvent)
{

toggleButton.gotoAndStop(toggleButton.buttonState);

} //rollout f(x)

function toggleClick(event:MouseEvent)
{
if (toggleButton.buttonState == on)
{
toggleButton.buttonState = off;
} //if
else
{
toggleButton.buttonState = on;
} //else
toggleButton.gotoAndStop(toggleButton.buttonState+
over);

} //toggle click f(x)

} //constructor f(x)

} //class

} //package

/
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### Re: [Flashcoders] My first code.

```Thank You So Much! :DI have been researching for over a
month!!  I am guessing that the 'this'  is pointing to the symbol or _mc I
attach the class to?
I ended up doing away with all of the  this because I was receiving an error
message saying  gotoAndStop is not a function.  Also I needed to declare the
variable  buttonState

Here it is!!! My first Class!
Thank you!

###

package
{

import flash.display.MovieClip;
import flash.events.MouseEvent;

public class ToggleButton extends MovieClip
{
//public var togglButton:MovieClip;
public var buttonState = MovieClip;

public function ToggleButton()
{
// constructor code

//event listeners
buttonState = off;

// Respond to mouse events
function rolloverToggle(event:MouseEvent)
{
gotoAndStop(buttonState+ over);

} //rollover f(x)

function rolloutToggle(event:MouseEvent)
{
gotoAndStop(buttonState);

} //rollout f(x)

function toggleClick(event:MouseEvent)
{
if (buttonState == on)
{
buttonState = off;
} //if
else
{
buttonState = on;
} //else
gotoAndStop(buttonState+ over);

} //toggle click f(x)

} //constructor f(x)

} //class

} //package

#
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```