Dear Michael,
I’m wondering if I missed something, but is there a mailing list for
stackage? Or has one of the standard lists (-cafe, libraries) been
designated for questions about stackage?
What I want to know is if you plan to provide a website for stackage
soon where the list of included pack
Seems like the function is easy to define:
replaceIfEq a b c = if c == a then b else c
Then the above can be written
replaceIfEq Foo Bar value
Or the slightly more general (in exchange for slightly more verbosity at
the call site)
replaceIf p r a = if p a then r else a
replaceIf (== Foo
Hi Alvaro,
I think you need something wha Scala has - the ability to create a partial
function from a case expression. In Scala you could write
def update[A](f: PartialFunction[A,A])(v: A): A =
f.orElse({ case x => x } : PartialFunction[A,A]).apply(v);
and then use it like
update[Int]({
2012/12/21 Radical :
> Sometimes I'll need something like:
>
> if value == Foo then Bar else value
>
> Or some syntactic variation thereof:
>
> case value of { Foo -> Bar; _ -> value }
>
> Is there a better/shorter way to do it? I'm surprised that it's more
> complicated to substitute a value o
Sorry for the double-post, sent the first one from the wrong email address.
Hi Joachim,
I have not yet created a mailing list, but it should certainly be done.
There is also not yet a web site for Stackage, but there should be one in
the near future. At the very least, we'll need to host reposito
I've looked into the custom "Prelude.hs" approach, and it's a bit tricky,
but does work out:
https://gist.github.com/4361578
The interpreter needs to run in the same directory as your "Prelude.hs".
However, if you try to run "ghci" in that directory, it will fail -
because it doesn't know that i
