> On 18 Feb 2015, at 18:13, Cameron Sanders via Pharo-users
> <pharo-users@lists.pharo.org> wrote:
>
>
> Date: 18 Feb 2015 18:12:33 CET
> Subject: i feel dumb / Pharo3 > OrderedCollection >> do:
> From: Cameron Sanders <camsand...@aol.com>
> To: Any question about pharo is welcome <pharo-users@lists.pharo.org>
>
>
> I must be making some silly error here that i cannot see clearly. Why does
> the following leave anything in the list 'a'? Run it in a workspace. With or
> without the shallowCopy, i am left with a list with half of the elements in
> it. Always half.
>
> This version of Pharo3 (21.0) was downloaded last week. I am running on a Mac.
>
> Thanks in advance. ... Maybe I just need more coffee.
> -Cam
>
> | a |
> a := { #a. #b. #c. #d. } asOrderedCollection.
> a shallowCopy do: [ :item | (a includes: item) ifTrue: [ a remove: item ]].
> a size
>
shallowCopy is not enough… OrderedCollection is made up of an internal array.
#copy does the right thing, just copies the array:
postCopy
array := array copy
and for Array, copy is a shallowCopy.
Marcus
