Re: Basic Array Access Strategy
Re: Basic Array Access Strategy
- Subject: Re: Basic Array Access Strategy
- From: John Stiles <email@hidden>
- Date: Thu, 20 Jan 2005 17:19:27 -0800
If you stored them in a structure other than an array, you could query
for a certain wavelength without having to sort or walk the
array--i.e., a dictionary.
Now if you wanted to find a range--say, all entries between wavelength
440 and 460--then you'd need to get a little bit more clever. If your
data was sorted, a binary search would be one way to go.
On Jan 20, 2005, at 5:13 PM, Richard Patterson wrote:
If I have an array of objects where each object has a set of instance
variables, how do I ask the array to give me the first object in which
one of the instance variables is equal to a certain value without
knowing the values for the other variables?
In other words if I have tabular data in which one column is a
wavelength and the other columns are red, green and blue
sensitivities, is there a way I can find the sensitivities associated
with a wavelength of 450 without sorting the array and walking through
it on my own? Will I also be told if there is no entry at that
wavelength?
Thanks.
Richard Patterson
Illusion Arts
6700 Valjean Avenue
Van Nuys, CA 91406
818 901-1077
FAX: 818 901-1995
email@hidden
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