* Andrei <[EMAIL PROTECTED]> [051028 15:57]:
Andrei, I really like your approach. Will which up an object interface
for it. Will have other applications, I'm sure.
thanks
tim
> Tim Johnson wrote:
> > Hello:
> >
> > # I have the following dictionary:
> > next_phases = {"open":"review","review":"write","write":"open"}
> >
> > # a 'phase is extracted by
> > next_phase = next_phases[self.phase
> >
> > Note that the value for each of the first keys is the key for
> > the next item, and that the value for the last key is the *first* key.
>
> I too would be tempted to use a list for this. Something along the lines of:
>
> phases = ['open', 'review', 'write']
>
> nextphase = phases[((1 + phases.index(phase)) % len(phases)]
>
> This is not as friendly as the dictionary option, but I'd wrap that in a
> function call (or object interface). It has some advantages:
> - there's a single instance of every string
> - it's obvious that it's a sequence
> - it's one of the standard ways of doing circular structures
> - there's no chance of introducing a dead branch, breaking the circle
> - it's easier to add/remove things.
> E.g. if you'd add and an "approve" step between review and write,
> the list approach requires a single update, while the dictionary
> requires one new key-value pair and modifications in another two
> places in order to get it working correctly.
>
> --
> Yours,
>
> Andrei
>
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--
Tim Johnson <[EMAIL PROTECTED]>
http://www.alaska-internet-solutions.com
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