Flash / Flex / ActionScript/Array/join

Converting an Array to a String: Use the join( ) method.

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var letters:Array = ["a", "b", "c"];
        trace(letters.join("|"));   // Displays: a|b|c
    }
  }
}

Converting Arrays to Lists

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var aEmployees:Array = ["A", "P", "C", "H"];
        var sEmployees:String = aEmployees.join(",");
        trace(sEmployees);
    }
  }
}
//A,P,C,H

Join object array

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        
        var bookshelf:Array = new Array(3);
        bookshelf[0] = new Book("A","a",1999);
        bookshelf[1] = new Book("B","b",2000);
        bookshelf[2] = new Book("C","c",2001);
        trace(bookshelf.join("\n"));
        bookshelf.sort();
    }
  }
}
 class Book {
        public var title:String;
        public var author:String;
        public var year:int;
        public function Book (title:String, author:String, year:int) {
            this.title = title;
            this.author = author;
            this.year = year;
        }
        public function toString():String {
            return """ + title + "", " + author + " (" + year + ")";
        }
    }

Use an array in a situation in which a string is required, Flash automatically calls the toString( ) method

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var letters:Array = ["a", "b", "c"];
        trace(letters);  // Displays: a,b,c
    }
  }
}

With join() you can use any delimiter you want

 

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var aEmployees:Array = ["A", "P", "C", "H"];
        var sEmployees:String = aEmployees.join(";");
        trace(sEmployees);
    }
  }
}
//A;P;C;H

Without a delimiter, Flash uses a comma by default

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

        var letters:Array = ["a", "b", "c"];
        trace(letters.join());   // Displays: a,b,c
    }
  }
}