[Tutor] Silly loop question
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ml.cyresse at gmail.com
Sat Aug 20 03:12:10 CEST 2005
Hehe,
Yah, I should've read the tutorial again, I do apologise, it was a 3
in the morning-coffee not working question.
Regards,
Liam Clarke
On 8/17/05, Alan G <alan.gauld at freenet.co.uk> wrote:
> > changeIndex = None
> > al = len(line)
> > for i in range(al):
>
> And theres the problem.
> Pythonprovides two loops, for is really a *foreach* so if you don't
> want to process *each* item - eg by jumping forward - then you really
> should use while and manage the index thataway.
>
> You can hack about with the indexin a for but basically its abusing
> the intent of a for loop. Beter to explicitly hack about in a while
> loop!
>
> So:
>
> while i < len(line):
> if changeIndex and i < changeIndex
> i = changeIndex
>
> if line[i] == "{":
> nextRightBracket = line.find("}",i)
> #other stuff happens
> changeIndex = nextRightBracket + 1
> else:
> i += 1
>
> > read Alan's tutorial again. *grin*
>
> Umm, well the section on branching does refer to the two loops and
> when
> each is most appropriate, so... :-)
>
> Alan G
> Author of the Learn to Program web tutor
> http://www.freenetpages.co.uk/hp/alan.gauld
>
>
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