Collection Types

[ehx6]

hi,
I am reading about collection and have a question about it.
I realize that there are a lot of collection classess:
ArrayList, SortedList.....etc
what difference b/w them and how would I know which one to use.
thanks
Ehx

 

[chiph]

In some of them, order is important:
ArrayList, SortedList, Stack, Queue

In others, order is not important:
HashTable

You can ignore any collection classes that start with "I", or have the word "Base" in them. Those are used to create the other collection types.

Chip H.


____________________________________________________________________
If you want to get the best response to a question, please read FAQ222-2244 first

 

[ehx6]

Chip, thanks for your input, can I use a collection to add information such as table fields. it would look like this
my collection:
---------------
id |name | age| country

basically, I am creating a complete row in a collection, then I can pass this collection to specific method to process it. Is that doable. or is there a better way to do that.
thanks
Ehx

 

[chiph]

You can do that. Everything gets converted to type Object, so the recipient would need to know that item 5 in the collection is a boolean, and item 6 is a string.

As you might imagine, this is not the best way to pass variables to a method. If you have more than 10 or so parameters, it's best to create another class to contain them all (this is called a messenger class). The advantage is you keep strong typing, and you can also access the members of the class via the dot operator.

Chip H.


____________________________________________________________________
If you want to get the best response to a question, please read FAQ222-2244 first

 

[ehx6]

Thanks chip, I am new to OOP development and I appreciate if you advice me of a good book to start reading about how to become pro in oop programming.
thanks
Ehx