javascript µÄ scope
myhere
// JavaScript ½Å±¾£¬½âÎöÐÍÓïÑÔ
//
var ABCD = function(){
var pub = {};
var pri = {};
pri.name = "myhere";
pri.age = 23;
//var ABCDE;
pub.setName = function( newName){
pri.name = newName;
};
// ÕâÀï pub.getName ±»¸³ÖµÎªÒ»¸öº¯Êý£¬¾ÍÊǶ¨ÒåÒ»¸öº¯Êý
// Õâ¸öº¯Êý²¢Ã»ÓÐÔËÐУ¬Õâ¸öº¯ÊýÖеıäÁ¿(²»¹ÜÊÇ local »¹ÊÇ global ¶¼²»»á±»Ì滻ΪËûµÄÖµ)
// Òò´ËÕâ¸ö pri.name »¹ÊÇÒ»¸ö±äÁ¿£¬ÊǶ¯Ì¬µÄ
pub.getName = function(){
return pri.name;
}
// ÕâÀï pub.N ÊÇÒ»¸öÖµ£¬ÊǺ¯ÊýµÄ·µ»ØÖµ
// ¶øÇÒÕâ¸öÖµÊDz»»áËæ pri.name µÄ¸Ä±ä¶ø¸Ä±ä
// ÒòΪ pub.N ÊÇÄäÃûº¯ÊýÒÔ pri.name Ϊ²ÎÊýµ÷ÓÃÄäÃûº¯ÊýºóµÄ·µ»ØÖµ
// Õâ¸ö pub.N Ö»ÄÜÊdzÌÐòÔËÐе½ÕâʱµÄ pri.name Öµ
// pub.N Ò²¿ÉÒÔͨ¹ý ABCD.N À´¸Ä±ä
pub.N = function( e){
return e;
}( pri.name );
pub.setAge = function( newAge){
pri.age = newAge;
}
pub.getAge = function(){
return pri.age;
}
pub.setOK = function()
pub.setA = function( s){
ABCDE = s;
}
pub.getA = function(){
return ABCDE;
}
return pub;
}(); // Ö±½ÓÔËÐÐÄäÃûº¯Êý£¬ABCD ÊÇÄäÃûº¯ÊýµÄ·µ»ØÖµ£¬¼´ÄäÃûº¯ÊýÖÐµÄ pub
// ÔËÐе½Õâʱ²¢Ã»Óö¨Òå ABCDE£»
ABCD.setA( 'boy');
// ÔËÐе½Õâʱ¶¨Òå ABCDE£¬ËûµÄ×÷ÓÃÓòÊÇ global scope£¬Í¨¹ý window['ABCDE'] ¿ÉÒÔ»ñµÃ£¬
// ABCDE Óë pri( ÄäÃûº¯ÊýÖеÄ) µÄ×÷ÓÃÓò²»Ò»Ñù£¬pri Ö»ÓÐͨ¹ý ABCD µÄ½Ó¿Ú¿ÉÒÔ·ÃÎÊ
// Òò´Ë ABCD ÐγÉÒ»¸ö scope¡£pub Ï൱ÓÚ php ÖÐµÄ public£¬pri Ï൱ÓÚ private
//
// Èç¹ûÔÚÄäÃûº¯ÊýÖж¨Òå ABCDE£¬ÔòËûµÄ×÷ÓÃÓò¾Í²»ÊÇ global scope ÁË£¬Ëû¾ÍºÍ pri ÊÇͬһ¸ö×÷ÓÃÓòÁË£¬ÊôÓÚ local scope
//
// javascript Öеĺ¯Êý¿ÉÒÔ¸³Öµ¸ø±äÁ¿( very important !!!!)¡£
// º¯ÊýÓÐ×Ô¼ºµÄ scope
// Òò´ËÒ»¸öº¯Êý¶¨ÒåÖпÉÒÔǶÌ׺ܶຯÊý£¬¶øÆäÖеÄÿ¸öº¯ÊýÓÖÓÐ×Ô¼ºµÄ scope
// Òò´Ë¿ÉÒÔÓкܶàǶÌ×µÄ scope£»ÔÚÕâЩǶÌ×µÄ scope ÖУ¬Íâ²ãµÄ scope ÖеÄ
// ±äÁ¿ÔÚÄÚ²ã scope Öпɼû£»ÄÚ²ã scope ÖеıäÁ¿ÔÚÍâ²ã scope Öв»¿É¼û
//
var a = "a ";
var A = function(){
var pub = {};
var b = "b ";
pub.setValue = function( v){
var c = v || 'c ';
var setAge = function( v){
var d = v || 'd ';
return a + b + c + d;
}
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