让你的js代码高大上

1 var slice = Array.prototype.slice;
2 slice.call(arguments); //转化成数组

1 var unboundSlice = Array.prototype.slice; 
2 var slice = Function.prototype.call.bind(unboundSlice);
3 slice(arguments);//转化成数组

1 (function(slice){
2       slice(arguments);
3 })(Array.prototype.slice);

1 function   A(){};
2 A.prototype.fn1=function(){};
3 A.prototype.fn2=function(){};

1  function A(){};
2  A.prototype={
3     constructor:A,
4     fn1:function(){},
5     fn2:function(){}
6  };

1 function A(){};
2 $.extend(A.prototype,{
3     fn1:function(){},
4     fn2:function(0{}
5 });

1 function A(){
2     var a=[];
3     
4     a.push("str1"); 
5     a.push("str2");
6     a.push("str3"); 
7 
8     return a.join("");
9 };

1 function A(){
2     return [
3         "str1",
4         "str2",
5         "str3"
6        ].join("");
7 };

1 var   a;
2 var   b;
3 var   c;

1 var  a,b,c;

1 if(a){
2  b();  
3 };//如果a为真，则执行函数b

1 a && b();

1 if(!a){
2   c();  
3 };//如果a为假，则执行函数c

1 !a || c();

1 if(a){
2   b();  
3 }else{
4    c();
5 }//如果a为真，则执行函数b,否则执行函数c;

1 a ? b():c();

1 1 $(obj).click(function (){});
2 2 $(obj).focus(function (){});
3 3 $(obj).blur(function (){});

1 $(obj).bind({
2     click:function(){},
3     foucus:function(){},
4     blur:function:(){}
5 });

1 for(var i =0 ;i < obj.length; i++){};

for(var i=0, len=obj.length;  i < len; i++){};

1 var a=[1,2,3];
2 var b=[4,5,6];
3 var a=a.concat(b);//a=[1,2,3,4,5,6]

1 var a=[1,2,3];
2 var b=[4,5,6];
3 a.push.apply(a,b);//a=[1,2,3,4,5,6]