thank you all
Il giorno 22/mar/2013, alle ore 00:20, Terry Reedy <tjre...@udel.edu> ha
scritto:
> On 3/21/2013 2:31 PM, leonardo selmi wrote:
>
>> i wrote the following code:
>>
>> def find(word, letter):
>> index = 0
>> while index < len(word):
>> if word[index] == letter:
>> return index
>> index = index + 1
>> return -1
>
> Since this is a learning exercise, consider the following.
>
> def find(word, letter):
> for index, let in enumerate(word):
> if let == letter:
> return index
> return -1
>
> for w, l, n in (('abc', 'a', 0), ('abc', 'c', 2), ('abc', 'd', -1)):
> assert find(w, l) == n
> print("no news is good news")
>
> I copied the code, wrote the test, ran it, and it passed. I then re-wrote
> until syntax errors were gone and the new version passed. For loops are
> specialized, easier-to-write version of while loops that scan the items of a
> collection (iterable). Learn them and use them well. Learn to write automated
> tests as soon as possible.
>
> --
> Terry Jan Reedy
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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