What's the best way to lookup something from a huge table?
I'm trying to write a piece of code that checks weather data given a
zipcode. But I first need to change that zipcode into another format
in order for it to work with the online service I'm querying. For
example:
1) User inputs zipcode 02139.
2) Application looks up zipcode in table and finds that 02139 is
USMA0007
3) Application uses code USMA0007 to query the online service.
The table itself is pretty simple: It's just two columns, one with
every zipcode in the US, and the other with the corresponding weather
code. But there are 41,805 zipcodes in the US, so I'm not sure of the
best way to implement this. The table only needs to be queried once,
after that I can store the weather code in memory.
What's the best way to do this? Thanks for your help!
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