SomeCollection every: 5 do: [:subset | subset collect: [:each | ...]] etc. If you want the first five only, return from the do: block.
Possibly, #every: by itself answers an iterator / collection conforming instance. On Jan 21, 2018 14:47, "James Foster" <smallt...@jgfoster.net> wrote: > Since ‘atMax:’ doesn’t seem as clear to me, I’d prefer ‘upToMax:’ or > ‘withMax:’ or (especially) the following: > > upTo: anInteger timesDo: aBlock > upTo: anInteger timesSelect: aBlock > upTo: anInteger timesCollect: aBlock > > James Foster > > > On Jan 21, 2018, at 8:56 AM, Stephane Ducasse <stepharo.s...@gmail.com> > wrote: > > > > I thought about something like that... > > > > SequenceableCollection >> atMax: numberOfItems do: aBlock > > "Execute the iteration with at the maximum numberOfItems. If the > > receiver contains less than numberOfItems iterate them all." > > 1 to: (numberOfItems min: self size) do: [:index | aBlock value: > > (self at: index)] > > > > This is an abstraction that we need to treat some samples. > > > > Stef > > > > On Sun, Jan 21, 2018 at 5:47 PM, Stephane Ducasse > > <stepharo.s...@gmail.com> wrote: > >> Hi Ben and Clement > >> > >> I have a collection (a dictionary in my case) and I want to get > >> maximum 5 bindings out of it and iterate on them. > >> I want keysAndValuesDo: or do: but only up to 5 elements. > >> > >> aDict atMax: 5 do: [:each | ] > >> > >> So I learned from:to:do: > >> > >> aCollection atMax: 5 do: [:each | ] > >> > >> Does it make sense? > >> > >> Stef > >> > >> On Sun, Jan 21, 2018 at 1:16 PM, Clément Bera <bera.clem...@gmail.com> > wrote: > >>> I don't think we do. Do you need it on SequenceableCollection or > >>> HashedCollection too ? > >>> > >>> Recently I was trying to iterate over the first N elements of a > collection > >>> and since there was no #first:do: I used #from:to:do:. I guess you > could use > >>> that too: > >>> > >>> aCollection from: 1 to: (aCollection size min: 1000) do: aBlock > >>> > >>> Which guarantees you iterate at max over 1000 elements. But that API is > >>> SequenceableCollection specific. > >>> > >>> On Sun, Jan 21, 2018 at 11:44 AM, Ben Coman <b...@openinworld.com> > wrote: > >>>> > >>>> On 21 January 2018 at 18:36, Stephane Ducasse < > stepharo.s...@gmail.com> > >>>> wrote: > >>>>> Hi > >>>>> > >>>>> I would like to iterate at max on a certain amount of elements in a > >>>>> collection. > >>>>> And I was wondering if we have such iterator. > >>>> > >>>> I'm not clear what functionality your asking for. Could you present > >>>> it as code & result if you assumed the iterator you want was > >>>> available? > >>>> > >>>> cheers -ben > >>>> > >>> > >>> > >>> > >>> -- > >>> Clément Béra > >>> Pharo consortium engineer > >>> https://clementbera.wordpress.com/ > >>> Bâtiment B 40, avenue Halley 59650 Villeneuve d'Ascq > > > > > > >
