Eric E. Dolecki wrote:
I don't care about the city, just that the zip code will work. On
an iPhone
testing against an array of 42,305 values... could that be pretty
quick?
Seems like a large set to go through looking. I'm sending the value
to a
webservice to return weather data.
Use an array of bits, not numeric values. Each bit position is
numbered (indexed) by zip-code. The bit is 0 if its zip-code is
invalid, 1 if valid.
Time to validate any given zip-code is constant: a couple of shifts
and ANDs.
Total data size: 100,000 bits, which is 12.5 KB.
-- GG
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