в 09:19, 26 мая 2010

2010-05-26T09:19:13Z

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2010-05-26T08:15:08Z

1 версия

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==Add extra parentheses to make the logic more apparent==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var current:Date = new Date( );

if ((current.getDate( ) == 17) && (current.getMonth( ) == 3)) {
trace ("Happy Birthday, Bruce!");
}
}
}
}
</source>

==Logical AND==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var x = 100;
var y = 51;

if (x>50 && y>50) {
// Code here executes only if x and y are greater than 50
}
}
}
}
</source>

==Logical NOT==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var now = new Date( ); // Create a new Date object
var day = now.getDate( ); // Returns an integer between 1 and 31
var month = now.getMonth( ); // Returns an integer between 0 and 11

if ( !( (month + day)==1) ) {
// Execute "not-January 1st" code
}
}
}
}
</source>

==Logical Operators in Actionscript==



<source lang="java">

Operator Name
&& And
|| Or
! Not

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var sUsername:String = "Joe";
var sPassword:String = "oass";

if (sUsername == "Joey"){
if (sPassword == "isAwesome"){
trace("That is the correct username and password.");
}
}
if (sUsername == "Joey" && sPassword == "isAwesome"){
trace("That is the correct username and password.");
}
}
}
}
</source>

==Logical OR==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var x = 10;
var y = 15;
if (x || y) {
// This code executes if one of either x or y is not zero
}
}
}
}
</source>

==The logical NOT operator is often used in compound conditions with the logical OR operator==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var userName:String = "Bruce";

if (!((userName == "Bruce") || (userName == "Joey"))) {
trace ("Sorry, but only Bruce and Joey have access to this application.");
}

}
}
}
</source>

==Use a logical NOT operator, !, to check if a condition is not true==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var userName:String = "Bruce";
if (!(userName == "Bruce")) {
trace ("This application knows only Bruce"s birthday.");
}
}
}
}
</source>

==Use the inequality operator, !===



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var userName:String = "Bruce";

if (userName != "Bruce") {
trace ("This application knows only Bruce"s birthday.");
}
}
}
}
</source>

==Use the logical OR operator, ||, to test whether either condition is true==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var current:Date = new Date( );

if ((current.getDay( ) == 0) || (current.getDay( ) == 6) ) {
trace ("Why are you working on a weekend?");
}
}
}
}
</source>

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Flash / Flex / ActionScript/Language/Logical Operators - История изменений

в 09:19, 26 мая 2010

Admin: 1 версия