Hi All,
Learning; Please bear with me.
Scenario:
1. Class>>User. InstVars: #(this that other userStatus userMeta)
2. Class>>UserManager (singleton). Instvars: users (RcIdentityBag: users)
When User is instantiated all its' instVars are populated correctly. Nested
objects as well.
To insert the User into the UserManager singleton instVar I created an add:
method on the instance side of UserManager to pass the User to the UserManager
as per:
---
add: aUser
users add: aUser
---
This works and I am able to created my database of users.
The difficulty I am having is that when I want to query the UserManager db with
something like:
---
RcIdentityBag(users) select: [ :each | each name := 'somename' ]
---
It seems that currently the only I know how to do this is to create a select:
method in UserManager simply to pass the desired search string into the
UserManager class such that I can use the Collection Classes api to do the
actual work, as per:
--- Pardon the not so smalltalky code ---
UserManager>>select: aString
| resultSet |
resultSet := users select: [ :each | each name := aString ].
^resultSet
---
I believe I read somewhere that in order to avoid this clunkiness that I could
refer to the users collection in UserManager via a symbol and access the api of
the identitySet directly. Something like:
---
UserManager class>>current
UserGlobals at: #FOO put users.
...
---
But when I do this I am unable to do something like:
---
#FOO add: user
---
Do to doesNotUndestand exceptions.
Finally Questions:
1. Am I totally off the mark with the use of smalltalk symbols?
2. Must I create the API in the managing class to perform the specific
functions I need from the collection API with respect to querying the
collection?
3. Is there a smalltalk way of doing this properly that I missed (reading all
the docs I can find in random order based of info I need - probably missing the
finer points)?
Any nudge in the correct direction would be greatly appreciated.
Thanks!
