2017-11-07 9:23 GMT+01:00 Nicolas Cellier <nicolas.cellier.aka.nice@
gmail.com>:

> I have other ideas yet.
>
> The selector undefinedFirst is good, but the implementation not so.
> I don't like the UndefinedSortFunction: too specific, compose oddly...
>
> In the PR, collatedBy: is the way to tell how we sort properties (if you
> have a better name, go, it's bikesheding day)
>
>     "sort by size of name"
>     (people sorted: (#name collatedBy: #size))
>         =  (people sorted: [:p| p name size])
>

It is nice idea but it should be not bound to sort functions. Because this
feature is useful for other block based messages:

people collect: #name >> #size

people select: #name >> #size >> #even

(I use >> as example).
Generally it is about functional programming. Would be nice to have this in
image because it will simplify scripting a lot.
I remember nice set of blog posts from Vassili Bykov about such kind of
things http://blog.3plus4.org/2007/03/.

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