Hi Joe,

Take a look at all of the Smalltalk collection classes. I'm not as familiar with Squeak as other Smalltalks, so I can't tell you how to do that in Squeak but I'm sure others can.

Smalltalk has classes like LookupTable and Dictionary where you can add items with methods like #at:put: where the #at: part is a key and the #put: part is a value. You can retrieve the value with the #at: method. There are other methods like #do: that run the values.

I really like the Smalltalk collections classes and use them all the time. They are unique to languages that treat blocks-of-code as objects and allows them to be passed as parameters. You can't do this in Java and therefore you don't see the same level of powerful collection methods.

Lou

Thanks for all your help. I really appreciate being able to knock things about before I code. And thanks for the code snippets I always find something useful in them.

David spoke about a RDB and a Table object. I have always thought a Table object would very handy to have in smalltalk. But I never see it. There is a Matrix. Maybe that can be used.

Or am I missing out on the power of defining my own arbitrary objects and just keeping them in a collection?

Sincerely,

Joe.

----------------------------------------------------------- Louis LaBrunda Keystone Software Corp. SkypeMe callto://PhotonDemon mailto:Lou@Keystone-Software.com http://www.Keystone-Software.com

Well,

(MasterAccountList select: [ :e | e balance > 100 and: [e creditScore < 500]]) explore

seems reasonably powerful to me. At least for starting out.

Cheers, Bob

On 10/17/12 1:25 PM, Joseph J Alotta wrote:

Or am I missing out on the power of defining my own arbitrary objects and just keeping them in a collection?