On May 23, 2007, at 17:16 , Bert Freudenberg wrote:
On May 23, 2007, at 16:37 , Darren White wrote:
Hello, Thanks fro the replies.
I think my first question was a little fuzzy. I think what I need
to do as change the question.
If for example I have a seaside web app and users need to create
an account. Now, for each user I create an object, say an instance
of class Users, which has instance variables such as name and
address. So the new user puts in their detail such as name,
address, telephone number and then click register. How should (not
what) the system name this object. What I'm confused about is I
don't know how may users the system will have have do I name all
the user object; I can't call them all aUser . If the first user
gets an object named user1 how do I create another instance of
User named user2 or What about If I want to use one of the input
field as part of the name of the object?
The example below may make it clear what I mean
10 timesRepeat: [
x := 1 asString.
''the value of x can be any string object"
user"how do I add x to be part off the name so I end up with
variable named user1 user2 ... " := User new.
x := x + x.]
There is a cool thing called a "collection" that can hold as many
users as you want:
users := OrderedCollection new.
10 timesRepeat: [users add: User new].
And later you can access an individual user like this:
users at: 2
users at: 5
Also, there is another kind of collection named dictionary that
allows to use objects other than integers (like strings) to be the key:
users := Dictionary new.
1 to: 10 do: [:i | users at: ('user', i asString) put: (User new)]
(I added parens for clarity, they're not necessary in this case)
Retrieval goes like this:
users at: 'user5'
Cheers,
- Bert -
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