[mdemare]

Clojure has #(+ % 10) for Arc's [+ _ 10]. Does anyone know if Arc inspired Clojure, or whether there's prior art for this syntax?

[scott_s]

I think the convention predates both. boost::bind for C++ does something similar: http://www.boost.org/doc/libs/1_40_0/libs/bind/bind.html

[jimbokun]

I think Clojure copied Arc on this.

[richhickey]

Actually it was inspired by Mathematica:

http://reference.wolfram.com/mathematica/ref/Slot.html

[Zak]

Goo appears to have something similar in its op (partial evaluation) function.

[tomjen2]

At least the _ part is used in both Haskell and Prolog.