>It's less of a big deal these days, but properly working lambda expressions were only available in Lisp until recently.
I think Haskell and ML had lambda expressions since like 1990.
I think Haskell and ML had lambda expressions since like 1990.
In particular, it implies a coherent design around scope and extent. And, much more indirectly, it points to time. EVAL-WHEN has finally made a bit of a stir outside Lisp.