C# week8_2

16/03/2010


 
Collection

collection : temporary data

data base : permanent data

 
Arraylist

Pros.

• more efficient than array (extend, minimize = flexible)
  
• arraylist can have different datatype, such as int, string and ocject of the class.
  

 

Arraylist al = new Arraylist();

al.Add(5);

al.Add(10);

al.Remove(5);

 

foreach

foreach(<type> <variable> in <list>)

*The list must be same datatype.

 

Hashtable

Hashtable hash = new Hashtable();

("key", "value")

hash.Containts

hash.ContaintsValue

*Remove only key

 
Stack k = new Stack();


 
Queue days = new Queue();