Earlier quoted context omitted.
>However, can someone please tell me why Elm needs two kinds of values? Because not all values depend on/change with time. A euclidean distance function is the same no matter when in time it exists. But, the distance between a player and an enemy is something that changes with time. So, you'd want to lift the euclidean distance function onto a signal like 'lift2 distance playerPos enemyPos'. I don't actually program…
But why not make the "lifting" implicit? If you put a signal into "distance", you get a signal back.
There was a discussion about this on the Elm mailing list: https://groups.google.com/d/topic/elm-discuss/PNtOH2CDHZo/di...