Flash / Flex / ActionScript/Statement/for

break is a keyword that allows you to stop processing a loop or conditional.

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var needle:int = 3;
        var haystack: Array = new Array(1,2,3,4,5,6);
        for (var i:int = 0; i < haystack.length; i++) {
           if (!(hay == haystack[i])) { 
             continue; 
           }
           trace("I found the needle!");
           break;
        }
    }
  }
}

Nested for loops

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var j:Number;
        for (var i:Number = 0; i < 3; i++){
          trace(i);
          for (j = 100; j > 97; j--){
            trace("\t" + j);
          }
        } 
    }
  }
}
0
    100
    99
    98
1
    100
    99
    98
2
    100
    99
    98

Perform more complex initializations and increments by adding additional expressions separated by commas

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        for(var i:Number = 0, a:Number = 25; i < 25; i++, a -= 2) {
          trace(i + " " + a);
        }
    }
  }
}
0 25
1 23
2 21
3 19
4 17
5 15
6 13
7 11
8 9
9 7
10 5
11 3
12 1
13 -1
14 -3
15 -5
16 -7
17 -9
18 -11
19 -13
20 -15
21 -17
22 -19
23 -21
24 -23

Place two statements in the for statement

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        for (var i:int = 0, j:int = 10; i < 10; i++, j--) {
          trace("i is " + i);
          trace("j is " + j);
        }
    }
  }
}

The for Statement

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

        var total = 2;
        
        for (var i = 0; i < 2; i++) {
          total = total * 2;
        }
        
        //here"s the equivalent while loop:
        var total = 2;
        var i = 0;
        
        while (i < 2) {
          total = total * 2;
          i++;
        }
    }
  }
}

Use a for loop to check whether a string contains the @ character

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var address = "me@moock.org";
        var isValidAddress = false;
        
        for (var i = 0; i < address.length; i++) {
          if (address.charAt(i) == "@") {
            isValidAddress = true;
            break;
          }
        }
    }
  }
}

Use for each loop to go through the array elements

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var games:Array = ["P","S","L"];
        
        for each (var game:* in games) {
          trace(game);
        }
    }
  }
}

Use For in loop to display all properties in an object

 
for (var element:String in targetObject) {
   // do some action
}
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var weather:Object = new Object();
        weather.temp = 45;
        weather.conditions = "rain";
        weather.pressure = 970;
        
        for (var element:String in weather) {
           trace(element + ": " + weather[element]);
        }
    }
  }
}

Use for loop statement to display all elements in an array

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

        var myArray:Array = ["A", "B", "C", "D",  "E", "F", "G"];
        for (var i:int = 0; i < myArray.length; i++) {
           trace("Hello, " + myArray[i] + "!");
        }
    }
  }
}

Use for loop to loop through the dynamic array

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

        var info:Object = new Object(  );
        info.city = "Toronto";
        info.country = "Canada";
        
        for (var detailName:* in info) {
          trace(detailName);
        }
        
        for (var detailName:* in info) {
          trace(info[detailName]);
        }
    }
  }
}

Use for statements to loop backward:

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        for (var i:int = 10; i > 0; i--) {
          trace(i);
        }
    }
  }
}