Immediate execution function : a function declaration, and immediately call this anonymous function is called immediately execute the function
In two ways:
Except that () operator outside! , +, -, =, and so the operator can immediately perform functions
Use the benefits of immediate execution function : to execute the function immediately by defining an anonymous function, create a new function scope, creating the equivalent of a "private" namespace, the namespace variables and methods, and will not damage the overall pollution Namespaces.
Global parameters can be accessed by passing
