js Function type_javascript skills

1. A function is an object, and the function name is a pointer to the function object and will not be bound to a function.
2. The function is not overloaded (function overloading: the same function name corresponds to the implementation of multiple functions.)
For Example:
　function addnum(num){return num 10}
　function addnum(num){return num 20}
addnum(10);//30
3. Function expression and function declaration (the parser will read the function declaration first, other situations are equivalent).
4. As a function of value.
Sort the object array according to an object attribute?

Copy the code The code is as follows:

function compareFunction(properyName){
return function(obj1,obj2){
var value1 = obj1[propertyName];
var value2 = obj2[propertyName];
if(value1>value2) {
return 1;
}else if{value1return -1;
else{
>var data = [{name : "Jin",age : 24},{name: "awei",25}];
data.sort(compareFunction("name"));
data[0] .name;


5. Function’s internal attributes (arguments(callee), this);
6. Function’s attributes and methods.
Attributes: length, prototype

Methods: apply(), call()