Self-defining functions模式

/* Title: 自我定义函数

Description: 自身重写，以减少第一次调用以后的代码量

*/

var scareMe = function () {

alert ( "Boo!" );

scareMe = function () {

alert ( "Double boo!" );

};

};

// 1. 添加阴属性

scareMe . property = "properly" ;

var prank = scareMe ;

var spooky = {

boo : scareMe

};

prank (); // "Boo!"

prank (); // "Boo!"

console . log ( prank . property ); // "properly"

spooky . boo (); // "Boo!"

spooky . boo (); // "Boo!"

console . log ( spooky . boo . property ); // "properly"

// 使用自我定义函数

scareMe (); // Double boo!

scareMe (); // Double boo!

console . log ( scareMe . property ); // undefined