On 10/22/06, Donald Bruce Stewart
Let's get join and split done!
I want to see this function done this time. So let's try hard not to restart the big threads we've had on this topic in the last couple of years. So I'll just point to the archives. http://thread.gmane.org/gmane.comp.lang.haskell.glasgow.user/10136/focus=136...
Getting bogged down in fiddly details will just derail this effort. See here. Perfectionists will not be tolerated! ;) http://haskell.org/haskellwiki/Protect_the_community
Well spoken.
Now, in summary, Josef: * Send a patch to libraries@, for a minimal implementation of the join function * And a patch for QuickCheck properites, to live under testsuite/tests/*. - e.g. for split . join == id words == join " "
Patches attached. I've also included a couple of properties that don't hold but which one might think hold. I'm not sure how useful it is to have that in the testsuite but I wanted to document them somewhere anyway.
Now, the name, join conflicts, so: * consperse * connect * intercat * the problem with joinWith (or whatever) is that traditionally it would be joinBy
So, I propose we start with just, say, 'connect', with some QC properties, and get that into base, before we get dragged out into a big discussion about the entire api design.
I think Jón's suggestion 'intercalate' was pretty sweet. I've chosen to use that name in my patch. Josef