Just on general principle, I think that making take in lazy match take in regular racket is more important than matching Haskell, but I don't really have a firm enough grasp on the details to have a strong opinion either way on the below.
Sorry, Robby On Wed, Jun 8, 2011 at 8:36 AM, Eli Barzilay <e...@barzilay.org> wrote: > So ... no objections to this? > > > Yesterday, Eli Barzilay wrote: >> While trying to finally get `take-while' etc, I realized that the >> problem with the `take' (and `drop' and related) argument order is >> even more thorny. The existing problem is that `take' in lazy takes >> the number first and then the list -- not a big problem by itself, >> but: >> >> * Contradicts Haskell's argument order >> >> * Contradicts Clojure's argument order >> >> * *And* contradicts srfi-1's argument order for `take-while', which >> takes the predicate first >> >> So how about making it take its inputs in any order? (Possibly >> deprecating the number-last in the docs and eventually removing it.) >> >> No need to start a flamewar -- I know why it would be bad. But the >> above mess and potential confusion seems big enough to outweigh it. >> Specifically, it seems to me very odd now to go with the srfi-1 >> ordering for `take-while' and friends. (I'm also fine with swapping >> the arguments completely, but it seems that the breakage makes it a >> bad change.) >> >> To make things balanced -- >> >> * I see two arguments for keeping the order as it is now: (a) it makes >> it more like `list-ref' etc, where the number comes last (potential >> solution if the above is acceptable: make it do the same too, or >> just admit that indexing is different from these things); and >> (b) it accomodates better a potential future (list-slice l from too) >> which would look odd with the from-too arguments before the list. >> >> * OTOH, the advantages of the number-first order are being compatible >> with the rest of the world, and an order that is uniformly used in >> `take-while' etc. >> >> Opinions? > > -- > ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: > http://barzilay.org/ Maze is Life! > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/dev > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
