Flash / Flex / ActionScript/Array/Dictionary

Iterate through the key-value pairs of an object with the for..in and for each..in loops.

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var notes:Object = {t: 2, g: 14, s: 9};
       for (var name:String in notes)
       {
           trace("Notes on " + name + ": " + notes[name]);
       }
   }
 }

}

       </source>
   
  

Using an Object as a Lookup Key with Dictionaries

   <source lang="java">

package{

 import flash.display.Sprite;
 import flash.utils.*
 public class Main extends Sprite{
   public function Main(){
       var notes:Dictionary = new Dictionary();
       var city:String = "New York City";
       var currentConditions:String = "light showers";
       var currentTemp:Number = 56;
       
       notes[city] = "Central Park";
       notes[currentTemp] = "20";
       notes[currentConditions] = "70% chance of precipitation";
       
       trace("Current Weather for", city, notes[city]);
       trace("Current Temperature :", currentTemp, "degrees", notes[currentTemp]);
       trace("Current Conditions :", currentConditions, "(", notes[currentConditions],")");
   }
 }

}

       </source>
   
  

When using delete on an item in an Array, the length property is not updated.

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var pastas:Object = {t: 2, g: 14, s: 9};
       trace(pastas.length); // Displays 9
       delete pastas["s"];
       trace(pastas.length); // Displays undefined
   }
 }

}

       </source>
   
  

Working with Associative Arrays

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var lotto:Array = new Array(12, 30, 42, 6, 29, 75);
       lotto.description = "This week"s lotto picks.";
       trace(lotto[3]); // Displays: 6
       trace(lotto["description"]); // Displays: This week"s lotto picks.
   }
 }

}

       </source>