Ben, Ron, I made a small example, and it works as you said it would:

a := #( #(1 2)  #(3 4)).
b := a asOrderedCollection.
b  => an OrderedCollection(#(1 2) #(3 4))
c := b select: [ :i | (i first) = 3 ].
c => an OrderedCollection(#(3 4))
d := c first
d =>  #(3 4)
d at: 2 put: 5
d =>  #(3 5)
b  => an OrderedCollection(#(1 2) #(3 5))

Okay, I will check my other code.

Sincerely,

Joe.




> On Jul 26, 2016, at 6:25 PM, Ben Coman [via Smalltalk] <[hidden email]> wrote:
>
> Hi Joe,
>
> As Ron said, you should not be getting a copy.  If you still have a
> problem, perhaps best if you post code for a complete example:
> * class definition (with just two instance variables)
> * instance variable accessor methods
> * instance creation & adding to collection
> * select statement
> * updating object
>
> cheers -ben
>
> On Wed, Jul 27, 2016 at 5:53 AM, Ron Teitelbaum <[hidden email]> wrote:
>
> > Hi Joe,
> >
> > If the orderedCollection contains your object DrivingDays then select should give you the object and not a copy.
> >
> > You don't need to add it back to the collection just update the object.
> >
> > Check your code for anything that might be making a copy.
> >
> > All the best,
> >
> > Ron Teitelbaum
> >
> >
> > -----Original Message-----
> > From: [hidden email] [mailto:[hidden email]] On Behalf Of Joseph Alotta
> > Sent: Tuesday, July 26, 2016 3:04 PM
> > To: [hidden email]
> > Subject: [Newbies] indexing into a collection
> >
> > Greetings,
> >
> > I have a OrderedCollection of DrivingDays.
> >
> >
> > an OrderedCollection(2016-01-02| quigley s| nil|18§
> >                      2016-01-03| marianos fresh| nil|5§
> >                      2016-01-04| fresh thyme| nil|5§
> >                      2016-01-05| panda express| nil|3§
> >                      2016-01-06| peets| nil|7§
> >                      2016-01-07| starbucks| nil|3§)
> >
> > I want to select aDrivingDay object from the list by date, update it by adding mileage and places visited and put it back into the list.
> >
> > If I #select the OrderedCollection, I get a copy of the item, not the same one in the OrderedCollection.
> >
> > How do I select an item in the list for update?
> >
> > Sincerely,
> >
> > Joe.
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