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Re: Pulling out data from one file thats not in anotherby graff (Chancellor) |
| on Apr 27, 2010 at 18:37 UTC ( [id://837163]=note: print w/replies, xml ) | Need Help?? |
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The problem that the OP wants to solve is just one instance of a very general problem: doing "set arithmetic" on two lists: intersection, union, exclusive-or.
I tend to encounter problems of this type so often in my work that I wrote a very general tool to address it -- you can find it here: cmpcol. It allows that one or both input lists may actually be flat tables (possibly with varied field delimiters), where just one or more columns are of interest for doing the set-arithmetic.
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