Re: Pharo-users Digest, Vol 76, Issue 36

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> Today's Topics:
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>    1. Re: As a SmallTalk youngster: A few questions... (Jupiter Jones)
>    2. Re: As a SmallTalk youngster: A few questions... (Jupiter Jones)
>
>
> ----------------------------------------------------------------------
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> Message: 1
> Date: Sun, 18 Aug 2019 09:09:39 +1000
> From: Jupiter Jones <[hidden email]>
> To: Any question about pharo is welcome <[hidden email]>
> Subject: Re: [Pharo-users] As a SmallTalk youngster: A few
> questions...
> Message-ID: <[hidden email]>
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>
> > 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' ]
> > ?
>
> Not sure if it?s just a typo, but it appears you?re trying to use assignment ( := ) rather than comparison ( = ) so shouldn?t this be:
>
> 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
> > ---
>
> This isn?t really necessary - it?s totally up to your application design. The singleton will work fine.
>
> > 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.
>
> It all looks good, apart from the select block.
>
> Cheers
>
>
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> Message: 2
> Date: Sun, 18 Aug 2019 09:11:56 +1000
> From: Jupiter Jones <[hidden email]>
> To: Any question about pharo is welcome <[hidden email]>
> Subject: Re: [Pharo-users] As a SmallTalk youngster: A few
> questions...
> Message-ID: <[hidden email]>
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> Also if you add #FOO to UserGlobals you should be able to reference it like:
>
> FOO add: user
>
> ie. without the symbol hash (#)
>
> > On 17 Aug 2019, at 11:28 pm, ian <[hidden email]> wrote:
> >
> > ---
> > #FOO add: user
> > ---
>
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