в 09:19, 26 мая 2010

2010-05-26T09:19:12Z

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2010-05-26T08:14:40Z

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==Adding New Elements with the length Variable==



<source lang="java">

package{
import flash.display.Sprite;

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

var colors = ["green", "red", "blue"];

colors.length = 50;

trace(colors); // green,red,blue,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
}
}
}
</source>

==Adding Values to an Array: Assigning Values Using Array-Access Notation==



<source lang="java">

package{
import flash.display.Sprite;

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

var aEmployees:Array = new Array(4);
aEmployees[0] = "A";
aEmployees[1] = "P";
aEmployees[2] = "C";
aEmployees[3] = "H";
trace(aEmployees.toString());
}
}
}
</source>

==if you assign a value to an element that has not yet been created, actionscript creates that element, and any other elements with indices between.==



<source lang="java">

package{
import flash.display.Sprite;

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

var aEmployees:Array = new Array(4);
aEmployees[0] = "A";
aEmployees[1] = "P";
aEmployees[2] = "C";
aEmployees[3] = "H";

aEmployees[9] = "Ruth";

trace(aEmployees.toString()); //A,P,C,H,,,,,,Ruth
}
}
}
</source>

==Read the data from an array using array-access notation to access one element at a time.==



<source lang="java">

package{
import flash.display.Sprite;

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

var aEmployees:Array = ["A", "P", "C", "H"];
trace(aEmployees[0]); // Displays: A
trace(aEmployees[1]); // Displays: P
trace(aEmployees[2]); // Displays: C
trace(aEmployees[3]); // Displays: H
}
}
}
</source>

==Referencing Array Elements==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var trees:Array = ["b", "m", "o", "c"];

var firstTree:String = trees[0];
var favoriteTree:String = trees[2];

trace(firstTree);
trace(favoriteTree);
}
}
}
</source>

==Setting an Element"s Value==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var cities:Array = ["Toronto", "Montreal", "Vancouver", "Waterloo"];
cities[0] = "London";
cities[3] = "Hamburg";
cities[2] = 293.3; // Notice that the datatype change is not a problem

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

==Sum the array elements==



<source lang="java">

package{
import flash.display.Sprite;

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

var ages:Array = [12, 4, 90];
var totalAge:Number = ages[0] + ages[1] + ages[2]; // Sum the array

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

==To add a new element to an existing array at a specific index: assign a value to that element.==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var fruits:Array = ["apples", "oranges", "pears"];

fruits[3] = "tangerines";

fruits[39] = "grapes";

trace(fruits); // Displays: undefined
trace(fruits[12]); // Displays: undefined

}
}
}
apples,oranges,pears,tangerines,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,grapes
undefined
</source>

==Use variable as the array index==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var cities:Array = ["Toronto", "Montreal", "Vancouver", "Waterloo"];

var i:int = 1;
cities[i] = "Beijing";

trace(cities); //Toronto,Beijing,Vancouver,Waterloo

}
}
}
</source>

==Use variables or complex expressions to specify an element index==



<source lang="java">

package{
import flash.display.Sprite;

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

var trees:Array = ["b", "m", "o", "c"];

var i = 3;
var lastTree:String = trees[i];
var randomTree:String = trees[Math.floor(Math.random( ) * 4)];
trace(lastTree);
trace(randomTree);
}
}
}
</source>

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в 09:19, 26 мая 2010

Admin: 1 версия