Please document regex feature

[nbartos]

I think the regex field matching option needs some documentation. For example expect using [^"]* or [^\"]* to work for each field in the below line, but it does not appear to.

"11/09/2010","ACH","","Electronic Deposit","","$1000.00","$1000.00"

[stant]

to do csv with a regex, this should work: ([^,]([,]|\Z)).
to split tabs like for excel: ([^\t]([\t]|\Z)).

it is using standard perl/java regex notation. It's powerful but a lot to teach. You can look it up though.