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| Date | Fri, 21 Sep 2012 01:33:38 -0700 |
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| Subject | Re: Functional way to compare things inside a list |
| From | Chris Rebert <clp2@rebertia.com> |
| To | thorsopia@lavabit.com |
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On Thu, Sep 20, 2012 at 3:58 PM, <thorsopia@lavabit.com> wrote:
> Hi,
>
> list = [{'1': []}, {'2': []}, {'3': ['4', '5']}]
Are the dictionaries each guaranteed to only contain a single
key-value pair? (Or is your example just simplistic?)
> I want to check for a value (e.g. '4'), and get the key of the dictionary
> that contains that value.
And what if there is no such dictionary? Or what if there are multiple
such dictionaries?
> (Yep, this is bizarre.)
>
> some_magic(list, '4')
> => '3'
>
> What's the functional way to do it?
Why do you care about the paradigm used?
> Is it possible to do it with a one-liner?
Who cares? It's possible to implement more complicated things in one
line of APL, but most people probably wouldn't recommend it.
Regards,
Chris R.
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Re: Functional way to compare things inside a list Chris Rebert <clp2@rebertia.com> - 2012-09-21 01:33 -0700
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