Actionscript 2 Sandbox

the readable stuff is at the Actionscript page, the sandbox is the-messing-around-with-snippets-section.

trace

var message = "Hi there";
trace (message);                                    // prints "Hi there"

var message = "yellow";
trace ("big " + message + " truck");                // prints "big yellow truck"

code hinting suffixes/names

to keep in good form you should keep to these common suffixes so that any programmer can read your code easily without finding it utterly incomprehensible.

variables:

• must start with letters, underscore or dollarsign.
• no hyphens or other punctuation besides the underscore.
• cannot start with a number.
• are case-insensitive, but keep it constant or you might get confused

• xxx_str // means the variable contains a string
• xxx_arr // means the variable contains an array

conditionals

var message = "yellow";
trace ("big " + message + " truck");                // prints "big yellow truck"
if (message == "yellow") {
trace ("yes, i did say big yellow truck.");        // prints "yes, i did say big yellow truck"
}

= assigning value
== comparing values

loops

this sequence... trace (101); trace (102); trace (103); trace (104); trace (105);

is equal to: var x = 101; trace (x); x = x + 1; trace (x); x = x + 1; trace (x); x = x + 1; trace (x); x = x + 1; trace (x);

is also equal to: var x = 101; while (x <= 105) { // as long as x is less than 105... trace (x); x = x + 1; // ...continue to trace x but add one each time }

they all print: 101 102 103 104 105

functions

sample:

function area(height, width){
return height * width;
}
area1 = area(10,15);
area2 = area(10,20);
area3 = area(10,20);

event based execution

someObject.onSomeEvent = someFunction;

for example:

skaGirl.onRelease = dirtyskanking;            // the object named skaGirl will dirtyskank when mouse is released

function dirtyskanking () {
this._parent._rotation = 360;                     // defines the rotation of the dirtyskanking.
}

sample

quiz

button1.onRelease = function () {         // on pressing button 1
this._parent.q1answer = 1;                // assigning 1 to q1 answer
this._parent.gotoAndStop("q2")            // after which we go to frame labelled as q2
}

if (q1answer == 3) {                      //  if answer was right
  totalCorrect = totalCorrect++;          //  increase number of total correct qns by one
}

confused about root, this, and parent? so am i!

this piece of code would work ON a frame on the main stage, one_mc being an object onnit.

function T1over() {
	_root.one_mc.gotoAndStop(2);
	getURL('javascript:modifyT1();');
}

_root.one_mc.onRollOver = T1over;

actionscript and javascript

• flash to/from javascript call