How is the AND/OR operator represented as in Regular Expressions?
Solution 1:
I'm going to assume you want to build a the regex dynamically to contain other words than part1 and part2, and that you want order not to matter. If so you can use something like this:
((^|, )(part1|part2|part3))+$
Positive matches:
part1
part2, part1
part1, part2, part3
Negative matches:
part1, //with and without trailing spaces.
part3, part2,
otherpart1
Solution 2:
'^(part1|part2|part1,part2)$'
does it work?
Solution 3:
Does this work without alternation?
^((part)1(, \22)?)?(part2)?$
or why not this?
^((part)1(, (\22))?)?(\4)?$
The first works for all conditions the second for all but part2
(using GNU sed 4.1.5)
Solution 4:
Not an expert in regex, but you can do ^((part1|part2)|(part1, part2))$
. In words: "part 1 or part2 or both"