Selecting a range within an array?
dsc at swcp.com
Wed Apr 7 19:30:49 CDT 2004
On Wednesday, April 7, 2004, at 05:59 PM, Glen Bojsza wrote:
> I am stuck with arrays but I really would like to have a faster
> solution... unless there is something that I'm missing??
Well, if the array is not in the context of 2D arrays, then you don't
need the second index. That might make calculating your key a little
Also, your example of the speed of lines only applies to 1D. If you
were taking a sub matrix with specified min and max column and min and
max row, you would have to take several chunks out. Even so, there can
be an advantage to contiguous data for many types of sub matrices.
Characters are even faster than lines. I have used packed numbers
using encode/decodeBinary in strings as matrices. You might be more
comfortable with a fixed number of characters.
Another approach is to rethink this. Do you really need the sub array?
Maybe what you need is the indexes into an array in a global variable
or some other specifier.
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