в 09:19, 26 мая 2010

2010-05-26T09:19:12Z

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2010-05-26T08:14:43Z

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==Access the last element of theArray: theArray[theArray.length - 1]==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){

var cities:Array = ["Toronto", "Montreal", "Vancouver", "Waterloo"];

trace(cities); // Toronto,Montreal,Vancouver,Waterloo
}
}
}
</source>

==Determining the Size of an Array==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){

var list:Array = [34, 45, 57];
trace(list.length); // Displays: 3

var words:Array = ["this", "that", "the other"];
trace(words.length); // Displays: 3

var cards:Array = new Array(24);
trace(cards.length); // Displays: 24
}
}
}
</source>

==Putting an element at index Array .length creates a new element right after the current last element==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var array:Array = new Array();

array.push("val 1", "val 2");

array[array.length] = "val 3";

trace(array);
}
}
}
</source>

==Removing Elements with the length Variable==



<source lang="java">

To delete elements from the end of the array: set the array"s length variable to a number smaller than the current length:

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){

var toppings:Array = ["p", "t", "c", "g", "b"];
toppings.length = 3;
trace(toppings); //p,t,c
}
}
}
</source>

==The length property of an array returns the number of elements in the array.==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var aEmployees:Array = ["A", "P", "C", "H"];

for(var i:Number = 0; i < aEmployees.length; i++) {
trace(aEmployees[i]);
}
}
}
}
</source>

==Use the Array constructor allows you to specify the length of the new array.==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var topTen:Array = new Array(10);
// creates an array with 10 spaces.
trace(topTen.length);
}
}
}
</source>

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Flash / Flex / ActionScript/Array/length - История изменений

в 09:19, 26 мая 2010

Admin: 1 версия