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JavascriptÊÇÒ»ÖÖ»ùÓÚ¶ÔÏóµÄÓïÑÔ£¬µ«ÊÇ£¬ÓÖ²»ÊÇÒ»ÖÖÕæÕýÒâÒåÉϵÄÃæÏò¶ÔÏóµÄÓïÑÔ£¬ÒòΪûÓÐclass£¨ÀࣩµÄÓï·¨¡£

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´´½¨¶ÔÏó¾ÍÊǰÑÊôÐÔ£¨property£©ºÍ·½·¨£¨method£©·â×°³ÉÒ»¸ö¶ÔÏ󣬻òÕß´ÓÔ­ÐͶÔÏóÖÐʵÀý»¯Ò»¸ö¶ÔÏó¡£

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1¡¢Ô­Ê¼Ä£Ê½

vardog1={};

dog1.name=¶þÅ£;

dog1.variety=ţͷ¹£;

vardog2={};

dog2.name=¶þ¹·;

dog2.variety=¹þÊ¿Ææ;

ÕâÑù·â×°¶ÔÏóËäÈ»¼òµ¥£¬µ«ÊÇÓÐÁ½¸öȱµã£¬Ò»ÊÇÈç¹ûÒª´´½¨¶à¸öʵÀýµÄ»°£¬Ð´ÆðÀ´»á±È½ÏÂé·³£¬¶þÊÇÕâÖÖд·¨²¢²»ÄÜ¿´³öʵÀýºÍÔ­ÐÍÖ®¼äÓÐʲô¹ØÏµ¡£

¶Ôԭʼģʽ½øÐиĽø£¬

functionDog(name,variety){

turn{

name:name,

variety:variety

};

}

vardog1=Dog(¶þÅ£,ţͷ¹£);

vardog2=Dog(¶þ¹·,¹þÊ¿Ææ);

¸Ä½øºó½â¾öÁË´úÂëÖØ¸´µÄÎÊÌ⣬µ«ÊÇdog1ºÍdog2Ö®¼ä²¢Ã»ÓÐÄÚÔÚÁªÏµ£¬²»ÊÇÀ´×ÔÓÚͬһ¸öÔ­ÐͶÔÏó¡£

2¡¢¹¹Ô캯Êýģʽ

¹¹Ô캯Êý£¬ÊÇÄÚ²¿Ê¹ÓÃÁËthisµÄº¯Êý¡£Í¨¹ýnew¹¹Ô캯Êý¾ÍÄÜÉú³É¶ÔÏóʵÀý£¬²¢ÇÒthis±äÁ¿»á°ó¶¨ÔÚʵÀý¶ÔÏóÉÏ¡£Ê¹Óù¹Ô캯Êý¿ÉÒÔ½â¾ö´ÓÔ­ÐͶÔÏó¹¹½¨ÊµÀýµÄÎÊÌâ¡£

functionDog(name,variety){

this.name=name;

this.variety=variety;

}

vardog1=newDog(¶þÅ£,ţͷ¹£);

vardog2=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog1.name);//¶þÅ£

print(dog2.name);//¶þ¹·

Ñé֤ʵÀý¶ÔÏóÓëÔ­ÐͶÔÏóÖ®¼äµÄ¹ØÏµ£º

print(dog1.cunstructor===Dog);//true

print(dog2.cunstructor===Dog);//true

print(dog1instanceofDog);//true

print(dog2instanceofDog);//true

ÕâÑù¿´À´¹¹Ô캯Êýģʽ½â¾öÁËԭʼģʽµÄȱµã£¬µ«ÊÇËü×Ô¼ºÓÖÒýÈëÁËеÄȱµã£¬¾ÍÊÇÓÐЩʱºò´æÔÚÀË·ÑÄÚ´æµÄÎÊÌâ¡£±ÈÈç˵£¬ÎÒÃÇÏÖÔÚÒª¸øÐ¡¹·Õâ¸ö¶ÔÏóÌí¼ÓÒ»¸ö¹«¹²µÄÊôÐÔ¡°type¡±£¨ÖÖÀࣩºÍÒ»¸ö¹«¹²·½·¨¡°bark¡±£¨·Í£©£º

functionDog(name,variety){

this.name=name;

this.variety=variety;

this.type=È®¿Æ;

this.bark=function(){

print(ÍôÍôÍô);

}

}

ÔÙȥʵÀý»¯¶ÔÏó£¬

vardog1=newDog(¶þÅ£,ţͷ¹£);

vardog2=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog1.type);//È®¿Æ

dog1.bark();//ÍôÍôÍô

print(dog2.type);//È®¿Æ

dog2.bark();//ÍôÍôÍô

ÕâÑù¿´ËÆÃ»ÓÐÎÊÌ⣬ÄÇôÎÒдÁíÒ»¶Î´úÂëÀ´¿´Ò»ÏÂÎÊÌâËùÔÚ£¬

print(dog1.bark()===dog2.bark());//false

´ÓÖÐÎÒÃÇ¿ÉÒÔ¿´³öÎÊÌ⣬ÄǾÍÊǶÔÓÚÿ¸öʵÀý¶ÔÏó¶øÑÔ£¬typeÊôÐÔºÍbark·½·¨¶¼ÊÇÒ»ÑùµÄ£¬µ«ÊÇÿ´Î´´½¨ÐµÄʵÀý£¬¶¼ÒªÎªÆä·ÖÅäеÄÄÚ´æ¿Õ¼ä£¬ÕâÑù×ö¾Í»á½µµÍÐÔÄÜ£¬À˷ѿռ䣬ȱ·¦Ð§ÂÊ¡£

½ÓÏÂÀ´ÎÒÃǾÍҪ˼¿¼ÔõÑùÈÃÕâЩËùÓÐʵÀý¶ÔÏó¶¼ÏàͬµÄÄÚÈÝÔÚÄÚ´æÖÐÖ»Éú³ÉÒ»´Î£¬²¢ÇÒÈÃËùÓÐʵÀýµÄÕâЩÏàͬÄÚÈݶ¼Ö¸ÏòÄǸöÄÚ´æµØÖ·£¿

3¡¢Prototypeģʽ

ÿһ¸ö¹¹Ô캯Êý¶¼ÓÐÒ»¸öprototypeÊôÐÔ£¬Ö¸ÏòÁíÒ»¸ö¶ÔÏó¡£Õâ¸ö¶ÔÏóµÄËùÓÐÊôÐԺͷ½·¨£¬¶¼»á±»¹¹Ô캯ÊýµÄʵÀý¼Ì³Ð¡£¿ÉÒÔÀûÓÃÕâÒ»µã£¬°ÑÄÇЩ²»±äµÄÊôÐԺͷ½·¨£¬¶¨ÒåÔÚprototype¶ÔÏóÉÏ¡£

functionDog(name,variety){

this.name=name;

this.variety=variety;

}

Dog.prototype.type=È®¿Æ;

Dog.prototype.bark=function(){

print(ÍôÍôÍô);

}

vardog1=newDog(¶þÅ£,ţͷ¹£);

vardog2=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog1.type);//È®¿Æ

dog1.bark();//ÍôÍôÍô

print(dog2.type);//È®¿Æ

dog2.bark();//ÍôÍôÍô

print(dog1.bark()===dog2.bark());//true

ÕâÀïËùÓÐʵÀý¶ÔÏóµÄtypeÊôÐÔºÍbark·½·¨£¬¶¼Ö¸Ïòprototype¶ÔÏ󣬶¼ÊÇͬһ¸öÄÚ´æµØÖ·¡£

¶þ¡¢¼Ì³Ð

ÏÖÔÚÓÐÒ»¸ö¶¯ÎïµÄ¹¹Ô캯Êý£º

functionAnimal(){

this.feeling=happy;

}

ÓÐÒ»¸öС¹·µÄ¹¹Ô캯Êý£º

functionDog(name,variety){

this.name=name;

this.variety=variety;

}

ÒÔÏÂÈç²»¶ÔAnimalºÍDog¶ÔÏó½øÐÐÖØÐ´£¬ÔòʹÓøôúÂë½øÐдúÈ룬ʾÀý´úÂëÖв»ÔÙÖØ¸´¡£

1¡¢Ô­ÐÍÁ´¼Ì³Ð

Dog.prototype=newAnimal();

Dog.prototype.constructor=Dog;

vardog=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog.feeling);//happy

Ô­ÐÍÁ´¼Ì³Ð´æÔÚÁ½¸öÎÊÌ⣺µÚÒ»µãÊǵ±±»¼Ì³Ð¶ÔÏóÖаüº¬ÒýÓÃÀàÐ͵ÄÊôÐÔʱ£¬¸ÃÊôÐԻᱻËùÓÐʵÀý¶ÔÏó¹²Ïí£¬Ê¾Àý´úÂëÈçÏ£»

functionAnimal(){

this.colors=[d,gen,blue];

}

functionDog(){

}

//¼Ì³ÐAnimal

Dog.prototype=newAnimal();

Dog.prototype.constructor=Dog;

vardog1=newDog();

dog1.colors.push(black);

print(dog1.colors);//d,gen,blue,black

vardog2=newDog();

print(dog2.colors);//d,gen,blue,black

µÚ¶þµãÊDz»ÄÜÔÚ²»Ó°ÏìËùÓÐʵÀý¶ÔÏóµÄÇé¿öÏ£¬Ïò¸¸¼¶¹¹Ô캯Êý´«µÝ²ÎÊý£¬ÕâÒ»µã²»×öʾÀý£¬´ó¼Ò¿ÉÒÔ×ÔÐÐÑé֤ϣ»

2¡¢¹¹Ô캯Êý¼Ì³Ð

functionDog(name,variety){

Animal.apply(this,arguments);

this.name=name;

this.variety=variety;

}

vardog=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog.feeling);//happy

ÕâÊÇÒ»ÖÖÊ®·Ö¼òµ¥µÄ·½·¨£¬Ê¹ÓÃapply»òÕßcall·½·¨¸Ä±ä¹¹Ô캯Êý×÷ÓÃÓò£¬½«¸¸º¯ÊýµÄ¹¹Ô캯Êý°ó¶¨µ½×Ó¶ÔÏóÉÏ¡£ËäÈ»½â¾öÁË×Ó¶ÔÏóÏò¸¸¶ÔÏ󴫵ݲÎÊýµÄÄ¿µÄ£¬µ«ÊǽèÖú¹¹Ô캯Êý£¬·½·¨¶¼ÔÚ¹¹Ô캯ÊýÖж¨Ò壬º¯ÊýµÄ¸´ÓþÍÎÞ´Ó̸Æð¡£

3¡¢¹¹Ô캯ÊýºÍÔ­ÐÍÁ´×éºÏ¼Ì³Ð

ÀûÓù¹Ô캯ÊýʵÏÖ¶ÔʵÀýÊôÐԵļ̳У¬Ê¹ÓÃÔ­ÐÍÁ´Íê³É¶ÔÔ­ÐÍÊôÐԺͷ½·¨µÄ¼Ì³Ð£¬±ÜÃâÁËÔ­ÐÍÁ´ºÍ¹¹Ô캯ÊýµÄȱÏÝ¡£

functionAnimal(name){

this.name=name;

this.colors=[d,gen,blue];

}

Animal.prototype.sayName=function(){

print(this.name);

};

functionDog(name,age){

//¼Ì³ÐÊôÐÔ

Animal.call(this,name);

this.age=age;

}

//¼Ì³Ð·½·¨

Dog.prototype=newAnimal();

Dog.prototype.constructor=Dog;

Dog.prototype.sayAge=function(){

print(this.age);

}

vardog1=newDog(¶þ¹·,1);

dog1.colors.push(black);

print(dog1.colors);//d,gen,blue,black

dog1.sayName();//¶þ¹·

dog1.sayAge();//1

vardog2=newDog(¶þÅ£,2);

print(dog2.colors);//d,gen,blue

dog2.sayName();//¶þÅ£

dog2.sayAge();//2

4¡¢YUIʽ¼Ì³Ð

ÓÉÔ­ÐÍÁ´¼Ì³ÐÑÓÉì¶øÀ´£¬±ÜÃâÁËʵÀý¶ÔÏóµÄprototypeÖ¸Ïòͬһ¸ö¶ÔÏóµÄȱµã£¨Dog.prototypeºÍAnimal.prototypeÖ¸ÏòÁËͬһ¸ö¶ÔÏó£¬ÄÇôÈκζÔDog.prototypeµÄÐ޸쬶¼»á·´Ó³µ½Animal.prototype£©¡£ÈÃDogÌø¹ýAnimal£¬Ö±½Ó¼Ì³ÐAnimal.prototype£¬ÕâÑùʡȥִÐкʹ´½¨AnimalʵÀý£¬Ìá¸ßÁËЧÂÊ¡£ÀûÓÃÒ»¸ö¿Õ¶ÔÏó×÷Ϊý½é£¬¿Õ¶ÔÏ󼸺õ²»Õ¼ÓÃÄڴ棬ʾÀýÈçÏ£º

functionAnimal(){}

Animal.prototype.feeling=happy;

functionextend(Child,Pant){

varF=function(){};

F.prototype=Pant.prototype;

Child.prototype=newF();

Child.prototype.constructor=Child;

}

extend(Dog,Animal);

vardog=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog.feeling);//happy

5¡¢¿½±´¼Ì³Ð£¨Ç³¿½±´ºÍÉ±´£©

°Ñ¸¸¶ÔÏóµÄÊôÐԺͷ½·¨£¬È«²¿¿½±´¸ø×Ó¶ÔÏó£¬Ò²ÄÜʵÏּ̳С£

¢Ùdz¸´ÖÆ

functionAnimal(){}

Animal.prototype.feeling=happy;

functionextend(Child,Pant){

varp=Pant.prototype;

varc=Child.prototype;

for(variinp){

c[i]=p[i];

}

}

extend(Dog,Animal);

vardog=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog.feeling);//happy

µ«ÊÇ£¬ÕâÑùµÄ¿½±´ÓÐÒ»¸öÎÊÌâ¡£ÄǾÍÊÇ£¬Èç¹û¸¸¶ÔÏóµÄÊôÐÔµÈÓÚÊý×é»òÁíÒ»¸ö¶ÔÏó£¬ÄÇôʵ¼ÊÉÏ£¬×Ó¶ÔÏó»ñµÃµÄÖ»ÊÇÒ»¸öÄÚ´æµØÖ·£¬¶ø²»ÊÇÕæÕý¿½±´£¬Òò´Ë´æÔÚ¸¸¶ÔÏ󱻴۸ĵĿÉÄÜ,±ÈÈçÔÚÉÏÀýÖÐÊʵ±Î»ÖÃÌí¼ÓÈçÏ´úÂë»á·¢ÏÖ£º

Animal.prototype.colors=[d,gen,blue];

Dog.colors.push(black);

print(Dog.colors);//d,gen,blue,black

print(Animal.colors);//d,gen,blue,black

µ±È»£¬ÕâÒ²ÊÇjqueryÔçÆÚʵÏּ̳еķ½Ê½¡£

¢ÚÉî¸´ÖÆ

functionAnimal(){}

Animal.prototype.feeling=happy;

functiondeepCopy(Child,Pant){

varp=Pant.prototype;

varc=Child.prototype;

for(variinp){

if(typeofp[i]===object){

c[i]=(p[i].constructor===Array)?[]:{};

deepCopy(p[i],c[i]);

}else{

c[i]=p[i];

}

}

}

deepCopy(Dog,Animal);

vardog=newDog(¶þ¹·,¹þÊ¿Ææ);

print(dog.feeling);//happy

É±´£¬Äܹ»ÊµÏÖÕæÕýÒâÒåÉϵÄÊý×éºÍ¶ÔÏóµÄ¿½±´¡£Õâʱ£¬ÔÚ×Ó¶ÔÏóÉÏÐÞ¸ÄÊôÐÔ£¨ÒýÓÃÀàÐÍ£©£¬¾Í²»»áÓ°Ïìµ½¸¸ÔªËØÁË¡£ÕâÒ²ÊÇĿǰjqueryʹÓõļ̳з½Ê½¡£

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