[etatoby]

I don't like the Arc language because it's dynamically typed and thus inherently unsafe (see other threads for this sort of discussion.)

But I like this particular feature. If you think about it, an array is a mathematical function, or map, from indices to values. So it makes sense to be able to apply it to indices to get the respective values.

[DavidSJ]

In that sense, map just composes its two arguments.

[JadeNB]

That's cool! I'm a mathematician and so inclined to (over-)abstract programming, but it had never occurred to me to think of it that way.

[sova]

Learn you a lisp for great justice