Re: [Haskell-cafe] Re: Keys and Maps [Was: Re: I just don't get it (data structures and OO)]

Justin Bailey wrote:

On 6/7/07, Grzegorz wrote:

...

All this hard work for something that in a lesser language would be the unimpressive: universe["Milky Way"]["Sun"] ;-P

Well, if you want to get picky there is the '!' operator defined in Data.Map:

...

universe ! "Milky Way" ! "Sun"

I second that. I particularly like the elimination of ]'s. We certainly need some symbol to separate the map and the key; but we do really need to also mark "here be the end of the key"? (Evidently, this carries over to array indexing and function application too, i.e., a!!i vs a[i], f$x or f x vs f(x).)