Frank Buss <[EMAIL PROTECTED]> wrote: > Alex Martelli wrote: > > > Sorry, but I just don't see what lambda is buying you here. Taking just > > one simple example from the first page you quote, you have: > > > > (defun blank () > > "a blank picture" > > (lambda (a b c) > > (declare (ignore a b c)) > > '())) > > You are right, for this example it is not useful. But I assume you need > something like lambda for closures, e.g. from the page
Wrong and unfounded assumption. > http://www.frank-buss.de/lisp/texture.html : > > (defun black-white (&key function limit) > (lambda (x y) > (if (> (funcall function x y) limit) > 1.0 > 0.0))) > > This function returns a new function, which is parametrized with the > supplied arguments and can be used later as building blocks for other > functions and itself wraps input functions. I don't know Python good > enough, maybe closures are possible with locale named function definitions, > too. They sure are, I gave many examples already all over the thread. There are *NO* semantic advantages for named vs unnamed functions in Python. Not sure what the &key means here, but omitting that def black_white(function, limit): def result(x,y): if function(x, y) > limit: return 1.0 else: return 0.0 return result Alex -- http://mail.python.org/mailman/listinfo/python-list
