16
Chapter 1: ActionScript Basics
Semicolons are required within
for
loops, as shown in the following example:
//For loop that adds numbers 1-10
var sum:Number = 0;
for (var i=1; i<=10; i++) {
sum += i;
}
Parentheses
When you define a function, place any parameters inside parentheses [()]:
function myFunction (name:String, age:Number, reader:Boolean){
// your code here
}
When you call a function, include any parameters passed to the function in parentheses, as
shown in the following example:
myFunction ("Steve", 10, true);
You can also use parentheses to override the ActionScript order of precedence or to make your
ActionScript statements easier to read. (See
“Operator precedence and associativity” on page 32
.)
You also use parentheses to evaluate an expression on the left side of a dot (.) in dot syntax. For
example, in the following statement, the parentheses cause
new Color(this)
to evaluate and
create a Color object:
(new Color(this)).setRGB(0xffffff);
If you don’t use parentheses, you must add a statement to evaluate the expression, as shown in the
following example:
myColor = new Color(this);
myColor.setRGB(0xffffff);
Comments
Using comments to add notes to scripts is highly recommended. Comments are useful for
tracking what you intended and for passing information to other developers if you work in a
collaborative environment or are providing samples. Even a simple script is easier to understand if
you make notes as you create it.
As shown in the following example, to indicate that a line or portion of a line is a comment,
precede the comment with two forward slashes (
//
):
my_btn.onRelease = function() {
// create new Date object
var myDate:Date = new Date();
var currentMonth:Number = myDate.getMonth();
// convert month number to month name
var monthName:String = calcMonth(currentMonth);
var year:Number = myDate.getFullYear();
var currentDate:Number = myDate.getDate();
};
Summary of Contents for FLEX-FLEX ACTIONSCRIPT LANGUAGE
Page 1: ...Flex ActionScript Language Reference...
Page 8: ......
Page 66: ...66 Chapter 2 Creating Custom Classes with ActionScript 2 0...
Page 76: ......
Page 133: ...break 133 See also for for in do while while switch case continue throw try catch finally...
Page 135: ...case 135 See also break default strict equality switch...
Page 146: ...146 Chapter 5 ActionScript Core Language Elements See also break continue while...
Page 808: ...808 Chapter 7 ActionScript for Flash...
Page 810: ...810 Appendix A Deprecated Flash 4 operators...
Page 815: ...Other keys 815 Num Lock 144 186 187 _ 189 191 192 219 220 221 222 Key Key code...
Page 816: ...816 Appendix B Keyboard Keys and Key Code Values...
Page 822: ...822 Index...
