15 Exercises to Know A Programming Language

Marc 'BlackJack' Rintsch bj_666 at gmx.net
Tue Jul 3 12:25:53 CEST 2007

On Tue, 03 Jul 2007 09:58:16 +0000, Martin wrote:

> "Write a program that takes as its first argument one of the words
> 'sum,' 'product,' 'mean,' or 'sqrt'  and for further arguments a
> series of numbers. The program applies the appropriate function to
> the series."
> My solution so far is this:
> http://dpaste.com/13469/
> I would really like some feedback. Is this a good solution? is it
> efficient? robust? what could be improved? any not looking for a
> revised solution, hints on what to improve are also very welcome.

Don't use `eval()` if it is not absolutely necessary.  Especially if the
input comes from a user it's a security hole.  `float()` is the function
to use here.

`mean()` does not work as you try to divide a list by a number.

	Marc 'BlackJack' Rintsch

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