JavaScript functions, methods, object codes_javascript skills

Function literals are suitable for functions that are used only once and do not need to be named. As in the following example, although the latter has a fact function name, it is only used for self-calling.

Copy code The code is as follows:

var f = function(x)
{
return x*x;
}
var f = function fact(x)
{
if(x<=1) return 1;
else return x*fact(x- 1);
};

Parameter array of function: Arguments object. Commonly used arguments[i] references, arguments.length, etc.
Object:
The method in the object definition (function) is actually a function. The difference from the nested function is that the object entity is referenced through the keyword this.

Copy code The code is as follows:

function Rectangle(w, h)
{
this.width = w;
this.height = h;
this.area = area;
this.enlarge = Rectangle_enlarge;
this.setSize = setSize;
//Pass Constructor definition method
function Rectangle_enlarge()
{
this.width *= 2;
this.height *= 2;
}
function setSize(width, height)
{
if(arguments.length < 2)
{
throw new Error("arguments less!");
}
else if(arguments.length >= 2 )
{
this.width = width;
this.height = height;
}
}
function area()
{
return (this.width * this.height);
}
function area1()
{
alert(10);
}
}

Prototype objects and inheritance :
The prototype object is an ideal place to store methods and other common attributes, which is equivalent to static fields in C#.