Re^2: regular expressions with commas?

[chas]

Those both match given the string "Blah,Y,X", which has a substring ending with ",Y", but doesn't itself end with that sequence. (It isn't completely clear to me what the OP wanted, though...)

[osunderdog]

I interpreted it as meaning a ",Y" after the name string. Many others interpreted it as meaning a ",Y" at the end of the line. The OP wasn't clear so I figure I would share my interpretation.