Other than PluggableSet, something like Unix's sort and uniq combo would work:
condenseOnFirst: aCollection
| lastSelected |
^ aCollection sorted select: [:each |
(lastSelected isNil
or: [lastSelected first ~= each first])
ifTrue: [
lastSelected := each.
true]
ifFalse: [false]]
> Sent: Thursday, August 25, 2016 at 7:42 PM
> From: "Sean P. DeNigris" <s...@clipperadams.com>
> To: pharo-users@lists.pharo.org
> Subject: [Pharo-users] Set on Attribute
>
> Say I have a collection like #('ab' 'ac' 'ba' bc') and I want to condense it
> so that a certain attribute is unique. In this example, say the first
> character, so I want one object where the first character is $a and one $b,
> but I don't care which object i.e. 'ab' or 'ac' for $a, but not both.
>
> Is there an elegant way to do that?
>
>
>
> -----
> Cheers,
> Sean
> --
> View this message in context:
> http://forum.world.st/Set-on-Attribute-tp4912672.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>
>
