How do I split a string by commas except inside parenthesis, using a regular expression?

Question

I want to split a string by comma:

\"a,s\".split \',\'  # => [\'a\', \'s\']

I don\'t want to split a sub-string if it is wrapped by par

Answer 1

Assuming that parentheses are not nested:

"a,s(d,f),g,h"
.scan(/(?:\([^()]*\)|[^,])+/)
# => ["a", "s(d,f)", "g", "h"]