javascript new Object(value)
2014-01-10 10:51
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一:Object的带参数构造函数
var obj = new Object(value);
value是js中的元类型,返回的是该元类型的包装类。
var aNumber= new Object(1);
var aBoolean = new Object(true);
var aString = new Object("str"); //与java不同,js有元类型string和string包装类String。
如果我们就是不按要求传元类型,传个对象会怎么样勒?
var obj1 = new Object();
var obj2 = new Object(obj1);
这个效果和下面代码一样...
var obj1 = new Object();
var obj2 = obj1;
如果我们无聊一点,传null,会怎样...
var obj = new Object(null);
效果等同
var obj = new Object(); //......
更多: http://msdn.microsoft.com/zh-cn/library/ie/kb6te8d3(v=vs.94).aspx
var obj = new Object(value);
value是js中的元类型,返回的是该元类型的包装类。
var aNumber= new Object(1);
var aBoolean = new Object(true);
var aString = new Object("str"); //与java不同,js有元类型string和string包装类String。
如果我们就是不按要求传元类型,传个对象会怎么样勒?
var obj1 = new Object();
var obj2 = new Object(obj1);
这个效果和下面代码一样...
var obj1 = new Object();
var obj2 = obj1;
如果我们无聊一点,传null,会怎样...
var obj = new Object(null);
效果等同
var obj = new Object(); //......
更多: http://msdn.microsoft.com/zh-cn/library/ie/kb6te8d3(v=vs.94).aspx
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