On 22 January 2018 at 00:47, Stephane Ducasse <stepharo.self@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.clement@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 <btc@openinworld.com> wrote:
On 21 January 2018 at 18:36, Stephane Ducasse <stepharo.self@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