в 09:19, 26 мая 2010

2010-05-26T09:19:12Z

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2010-05-26T08:14:42Z

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==Extracting Subsets of Array Elements==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var aEmployeesAll:Array = ["A", "P", "C", "H",
"Gilberto", "Mary", "Ayla", "Riad"];
var aEmployeesExec:Array = aEmployeesAll.slice(0, 4);
var aEmployeesNew:Array = aEmployeesAll.slice(4, 6);
var aEmployeesStaff:Array = aEmployeesAll.slice(6);
trace(aEmployeesExe.toString());
trace(aEmployeesNew.toString());
trace(aEmployeesStaff.toString());
}
}
}
A,P,C,H
G,M
A,R
</source>

==Inserting Elements into an Array: arrayName.splice(startingIndex, numberOfElementsToDelete, element1[,...elementN]);==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var aEmployees:Array = ["A", "P", "C", "H"];
aEmployees.splice(3, 0, "R", "H", "L");
trace(aEmployees.toString()); // A,P,C,R,H,L,H
}
}
}
</source>

==Removing Elements from Within an Array==



<source lang="java">

package{
import flash.display.Sprite;

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

var aEmployees:Array = ["A", "P", "C", "H"];
var aRemovedEmployees:Array = aEmployees.splice(2, 2);
trace(aEmployees.toString());
trace(aRemovedEmployees.toString());
}
}
}
//A,P
//C,H
</source>

==splice( ) can both remove elements from and add elements to an array.==



<source lang="java">

package{
import flash.display.Sprite;

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

var letters:Array = ["a", "b", "c", "d", "e", "f"];
letters.splice(1, 3);
letters.splice(1);

trace(letters); // a
}
}
}
</source>

==splice( ) returns a new array containing the deleted elements==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var letters:Array = ["a", "b", "c", "d"];

var deleted:Array = letters.splice(0, 2);

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

==The splice( ) method can add elements to, or remove elements from, an array.==



<source lang="java">

theArray.splice(startIndex, deleteCount, item1, item2,...itemn)

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var months:Array = new Array("January", "Friday",
"April", "May", "Sunday", "Monday", "July");
months.splice(1,1);
months.splice(1, 0, "February", "March");
months.splice(5, 2, "June");
months.splice(3); // months is now: ["January", "February", "March"]

trace(months); //January,February,March
}
}
}
</source>

==Use slice( ) instead of concat( ) to create a copy of an array==



<source lang="java">

package{
import flash.display.Sprite;

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

var newLetters:Array = letters.slice(0);

trace(letters); // Displays: "a,b,c"
trace(newLetters); // Displays: "a,b,c"

letters = ["d", "e", "f"];

trace(letters); // Displays: "d,e,f"
trace(newLetters); // Displays: "a,b,c"
}
}
}
a,b,c
a,b,c
d,e,f
a,b,c
</source>

==When you remove elements from an array in a for statement, you need to change the value of the index variable accordingly==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var numbers:Array = new Array(4, 10);
numbers[4] = 1;
trace(numbers); // Displays: 4,10,undefined,undefined,1

for(var i:int = 0; i < numbers.length; i++) {
if(numbers[i] == undefined) {
numbers.splice(i, 1);
}
}
trace(numbers); // Displays: 4,10,undefined,1
}
}
}
// 4,10,,,1
// 4,10,,1
</source>

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

в 09:19, 26 мая 2010

Admin: 1 версия