Skip to main content
A
Anonymous
February 8, 2008
Answered

Using for( x in obj )

  • February 8, 2008
  • 3 replies
  • 245 views

If I have this in my Flash file all is great, but I want to put this into a custom Class file. What flash class do I need to import into my custom class to get this to work.

var x = 0;
for( item in param_ ){
x=x+1;
trace( x + ': ' + item + ' = ' + param_[item] );
} // for

The error message in the Output box is "There is no property with the name 'item'."
Again this only occurs if I place the code in the Class file I have made.
This topic has been closed for replies.
Correct answer Newsgroup_User
ooba,

> The error message in the Output box is "There is no property
> with the name 'item'."

The reason you're seeing that is because you haven't declared your
"item" variable anywhere. Historically, Flash has been very lenient (such
as not requiring variable declarations), but in class files, you have have
to start sitting up straight, so to speak. ;)

var x:Number = 0;
for (var item:String in param_ ) {
x ++;
trace(x + ": " + item + " = " + param_[item]);
}

I added the var keyword in front of item; that should do it. I also
added strong typing (:Number, :String) to your variables, which in
ActionScript 2.0 helps with code completion and useful error warnings at
compile time. Finally, I swapped your expression x = x+1 with x++, just
because the ++ operator makes a nice shortcut.


David Stiller
Co-author, Foundation Flash CS3 for Designers
http://tinyurl.com/2k29mj
"Luck is the residue of good design."


3 replies

A
Anonymous
February 8, 2008
Thank you to both of you. i had found after reading clbeech response the issue with declaring the var and decided to add in strong type as well. Being that David Stiller answer was more descriptive to a reader I marked his as the answer. Thanks again fellow Flashers.
clbeech
clbeech
Inspiring
February 8, 2008
lol!! - you're welcome ooba, and np! David's answers will always be much clearer than mine LOL!! :)
N
Newsgroup_UserCorrect answer
Inspiring
February 8, 2008
ooba,

> The error message in the Output box is "There is no property
> with the name 'item'."

The reason you're seeing that is because you haven't declared your
"item" variable anywhere. Historically, Flash has been very lenient (such
as not requiring variable declarations), but in class files, you have have
to start sitting up straight, so to speak. ;)

var x:Number = 0;
for (var item:String in param_ ) {
x ++;
trace(x + ": " + item + " = " + param_[item]);
}

I added the var keyword in front of item; that should do it. I also
added strong typing (:Number, :String) to your variables, which in
ActionScript 2.0 helps with code completion and useful error warnings at
compile time. Finally, I swapped your expression x = x+1 with x++, just
because the ++ operator makes a nice shortcut.


David Stiller
Co-author, Foundation Flash CS3 for Designers
http://tinyurl.com/2k29mj
"Luck is the residue of good design."


clbeech
clbeech
Inspiring
February 8, 2008
couple of things here, first you should not use 'x' as a variable name, because it is a reserved word in Flash, used as a standard Object property. Second you should add 'var' to the loop condition as in:

for(var item in param_) { ... }

third, side note, you can increment a variable's value using x++; instead of x=x+1; (although you should not use x).
Terms & ConditionsAccessibility statement
Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices