в 09:19, 26 мая 2010

2010-05-26T09:19:13Z

Admin: 1 версия

2010-05-26T08:15:07Z

1 версия

Новая страница

==Accessing Definitions from Within a Function==



<source lang="java">

public function m ( ) {
var currentObject = this;
function f ( ) {
trace(currentObject);
}
}
</source>

==A function that calculates the area of a rectangle and returns the value as a number==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
trace(calculateArea(2,3));
}
function calculateArea(nA:Number, nB:Number):Number {
var nArea:Number = nA * nB;
return nArea;
}
}
}
</source>

==Calling Functions==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
displayGreeting();
}
function displayGreeting():void {
trace("Hello.");
}
}
}
</source>

==Creating Recursion function==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
trace(factorial(3));
}
function factorial(nOperand:Number):Number{
if(nOperand > 0){
return nOperand * factorial(nOperand - 1);
}
else{
return 1;
}
}
}
}
</source>

==Define a function==



<source lang="java">

/*
function functionName():datatype {
statements
}
*/
package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
displayGreeting();
}
function displayGreeting():void {
trace("Hello.");
}
}
}
</source>

==Functions as Objects==



<source lang="java">

package{
import flash.display.Sprite;
import flash.events.MouseEvent;
public class Main extends Sprite{
public function Main(){
addEventListener(MouseEvent.CLICK, onClick);
}
function onClick(event:MouseEvent):void {
trace(" Handle click.");
}
}
}
</source>

==Function to search an array==



<source lang="java">

package{
import flash.display.Sprite;

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

}
function findMatchingIndex(aTitles:Array,
sTitle:String):Number
{
for(var i:Number = 0; i < aTitles.length; i++) {

if(aTitles[i] == sTitle) {
return i;
}
}

return null;
}
}
}
</source>

==Global Functions==



<source lang="java">

package {
import flash.system.*;
public function isLinux ( ) {
return Capabilities.os == "Linux";
}
}
</source>

==Nested function call==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
function1();
function2();
}
function function1():void{
function2();
}
function function2():void{
if(arguments.caller == function1)
trace("function2 called from function1");
else
trace("function2 not called from function1");
}
}
}
// function2 not called from function1
// function2 not called from function1
</source>

==Nested Functions==



<source lang="java">

public function a ( ) {
b( );
function b ( ) {
}
}

package{
import flash.display.Sprite;

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

}
public function getRandomPoint () {
var randomX = getRandomInteger(5, 10);
var randomY = getRandomInteger(10, 15);

function getRandomInteger (min, max) {
return min + Math.floor(Math.random( )*(max+1 - min));
}
}
}
}
</source>

==Package-Level Functions==



<source lang="java">

package packageName {
public function identifier ( ) {
}
}
To make the function accessible only in that package, we precede the definition with the access control modifier internal:
package packageName {
internal function identifier ( ) {
}
}
package utilities {
import flash.system.*;
public function isMac ( ) {
return Capabilities.os == "MacOS";
}
}
</source>

==Passing Parameters to Your Function==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
trace(getCircumference(10));
}
function getCircumference(diameter:Number):Number {
return Math.PI * diameter;
}
}
}
</source>

==Source-File-Level Functions==



<source lang="java">

package {
class A {
public function A ( ) {
}
}
}
function f ( ) {
}
Access-control modifiers cannot be included in source-file-level function definitions.
</source>

==Writing Recursive Functions==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
trace(factorial(3)); // Displays : 6
}
function factorial(i:uint):uint {
if (i == 0) {
return 1;
} else {
return (i * factorial(i-1));
}
}
}
}
</source>

← Предыдущая	Версия 09:19, 26 мая 2010
(нет различий)

Flash / Flex / ActionScript/Function/function - История изменений

в 09:19, 26 мая 2010

Admin: 1 версия