Hello, @Uko
Well I implemented Symbol>>value:value: in a similar fashion than Symbol>>value: for 'aCollection collect: #aSymbol'. But that's not a perfect solution for sure. @Camille I used PluggableSet and PluggableDictionary in my project and they were so slow that in the end I implemented my own collection. It will be a real alternative when we will have clean blocks. (For that we need to merge with Cog's trunk which includes merging Spur)... 2014-03-11 10:45 GMT+01:00 Yuriy Tymchuk <[email protected]>: > > On 11 Mar 2014, at 10:19, Clément Bera <[email protected]> wrote: > > Hello, > > [ Note: So in the default Pharo the method is named #sort: not #sortByProp: > or #sortBy: but it's a detail ] > > > Yes, my mistake, I was misguided by #isSortedBy: > > Now #sortByProp: is my own example method that accepts a block and > executes it for each sortable item and then the result is compared. > > I don't like the idea to implement #value:value: for a symbol because it > caries a bit of a logic inside it. > > Uko > > > I like this idea because I also have always the problem. So I would like > to be able to do: > > projects sort: #creationDate > > The implementation would be, in a similar fashion to how Symbol>>value: is > implemented for aCollection collect: #isPlague : > > Symbol>>value: val1 value: val2 > ^ (val1 perform: self) <= (val2 perform: self) > > Then : > > (#( 10 42 31 23 90 87 65) collect: #asValueHolder) sort: #value > > Answers: > > an Array(a NewValueHolder[ 10 ] a NewValueHolder[ 23 ] a NewValueHolder[ > 31 ] a NewValueHolder[ 42 ] a NewValueHolder[ 65 ] a NewValueHolder[ 87 ] a > NewValueHolder[ 90 ]) > > which is correct :-). > > However I do not like: > > projects sort: [ :proj | proj author birthDate ] > > If you allow that where is the limit to the thing you want to allow ? In > addition, I do not see any nice implementation and you could just > implement in project > > Project>>authorBirthDate > ^ self author birthDate > > Best, > > Clement > > > > 2014-03-11 9:19 GMT+01:00 Yuriy Tymchuk <[email protected]>: > >> Hi guys. >> >> This is a thing that I encounter quite often. >> >> Eg I have a collection of projects and I want to sort them by creation >> date. It would be nice to be able to do something like: >> >> projects sortByProp: #creationDate >> >> or by birth date of the author >> >> projects sortByProp: [ :proj | proj author birthDate ] >> >> Maybe I'm wrong, but as I've told already I encounter it quite often and >> writing something like >> >> projects sortBy: [ :prev :next | prev creationDate <= next creationDate ] >> >> is boring for me. >> >> Cheers. >> Uko >> > > >
