Question

I’m trying to filter out some objects based on an attribute property in C#. I’ve decided to do this based on comparing two comma delimited lists such that:

• “a,b,c” ~ “a,b,c”, “a,c,b”, “c,a,b”, etc..
• “a,b,*” ~ “a,b,c”, “a,d,b”, “g,a,b”, “a,b”, etc..
• “a,b,c” !~ “a,c,d”, “a,c”, “a”, etc..

I figure you should be able to do this with a simple regex match expression but I can’t figure it out as yet.

Anyone know how to do this? In the mean time going to brute force it with code.

Thanks in advance

–EDIT

by ~ I mean equivalent, sorry for confusion.

also “a,b,c” could also be “abra,barby,candybar”. Its not single characters but a list of values.

Answer 1

It’s not a regular expression, but it’s much simpler than any one could possibly be.

var attributes = input.Split(",");
var testCase = test.Split(",");

return attributes.All(x => testCase.Contains(x)) && testCase.All(x => attributes.Contains(x);

If you find a *, leave off one half of the && expression.