On 22 January 2018 at 00:47, 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?
Just some random thoughts. Perhaps something more generic...
aDict doN: [ :each :n | aCollection add: each]
while: [ :each :n | n <=5 ]
For #select: & #collect: there is a distinction to make whether it is
5 elements processed
or 5 elements returned.
aDict select: [ :each | "do something" ]
while:
[ :iterator | iterator selectedCount <= 5 ]. "or..."
[ :iterator | iterator processedCount <= 5 ]. "or..."
[ :iterator | (iterator element ~= "breakElement")
cheers -ben
> 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
>
