程式筆記

1. var Db = function() {
2. //private fields
3. var member = "private fields";
4. // public fields
5. this.menber = "public fields"
6. //constructor
7. constructor = function() {
8. alert(member);
9. }
10. //private methods
11. methods = function() {
12. alert(member);
13. } 
14. //public methods
15. this.methods = function() {
16. alert(member);
17. }
18. //do constructor
19. constructor();
20. }
21. 
    
22. var idb = new Db();

在function中定義的function，內部的function可以存去外部function內定義的變數，這樣叫做Closure

在js中邏輯運算中，0、""、null、false、undefined、NaN2. 都判定是false，其他則是true

index = '1';

var val = {'1':'One','2':'Two','3':'Three','4':'Four'}[index] || 'none';