Jacek Generowicz wrote: > "Anna" <[EMAIL PROTECTED]> writes: > > > With class and def, I at least have a *name* to start with - class > > Square pretty obviously is going to have something to do with > > geometric shapes, I would hope (or maybe with boring people...). > > Or maybe with multiplying something by itself. Or maybe the author > made some changes in his program, and forgot to rename the class > sensibly, and the class' functionality has nothing to do with squares > of any sort any more. Or maybe he felt the name "Square" was very > appropriate for something else in his program and inadvertently gave > the same name to two different entities thereby clobbering the one > whose use was intended at this point.
Idjits abound. ;-) Can't make anything foolproof because fools are so ingenious. > > Whereas, with lambda - I have *nothing* to go on. > > Aaah. OK, you object to lambda because it gives you no clue as to what > the function does, rather than with the word "lambda" itself? Is that > it? > > So, IIUC, you consider > > def add_one(x): > return x+1 > > map(add_one, seq) > > to be clearer than > > map(lambda x:x+1, seq) Completely, totally, and unambiguously: the version with the defined function is immediately clear to me; the version with the lambda is decipherable, but requires deciphering (even at 2nd and 3rd glance). But first, wouldn't something like: [x+1 for x in seq] be even clearer? Given an example more complex (which you must admit, lambdas usually are) - the name of the function is something my brain can hold on to to represent the group of operations; where with the lambda, I need to mentally go through each operation each time I try to read it. And the more complex f is, the harder time I have holding it all in my head while I figure out how to get from the beginning value x to the ending value f(x). lambda is an O(N*N) problem for my brain. I could see someone more mathematically-minded being happier with lambda. It's not, after all, the word "lambda" itself; I would still have some issues with using, say "function", instead of "lambda", but at least then I would immediately know what I was looking at... Anna -- http://mail.python.org/mailman/listinfo/python-list
