Apply a function to each list member?
Mikael Olofsson
mikael at isy.liu.se
Fri Nov 5 06:49:08 EST 1999
On 05-Nov-99 Malcolm Tredinnick wrote:
> Correct. In fact, since we're being precise, let me point out that
> (mathematically speaking), all functions are maps (or mappings), but not
> all mappings are functions. The point is that a function should have only a
> single "output" for any given input (i.e. it should be many-to-one or
> one-to-one, not one-to-many). So some mapping that sends, say, the number 2
> to the numbers 3 and 4 is not a function (but a mapping that sends both the
> numbers 3 and 4 to the number 2 is a function, since for each input there
> is only a single output).
Ahh, there we got it. Good thing someone has got it straight.
> (Hmm .. I've just realised that a few of my recent postings have had
> amazingly little to do with Python. I promise to stick to the topic from
> now one. Swear! :-) )
I-think-I-should-get-in-line-ly y'rs
/Mikael
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Date: 05-Nov-99
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