Data structure question
Joseph L. Casale
jcasale at activenetwerx.com
Mon Nov 18 03:43:09 CET 2013
> Not entirely sure I understand you, can you post an example?
> If what you mean is that you need to locate the function (lambda) when
> you know its corresponding strings, a dict will suit you just fine.
> Either maintain two dicts for the two separate strings (eg if they're
> "name" and "location" and you know whether you're looking up a name or
> a location), or maintain a single dict with two entries per tuple (one
> for each string). That gives you efficient and clean lookups.
Basically I have several mappings like the following:
'string_a', 'string_b', lambda s: ...
I need to be able to index a mapping (there are ~100) by either string_a or
string_b and at one point with one of those strings I would pull the lambda
or the other string.
The important part is getting the row by either of the two strings. I know I
could just subclass dict and look it up the hardway with __missing__, just
wondered if something elegant existed already. I may only know string_b and
need string_a and the lambda.
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