Hello, [ Note: So in the default Pharo the method is named #sort: not #sortByProp: or #sortBy: but it's a detail ] 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 <yuriy.tymchuk@me.com>:
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