Regex to pick characters outside of pair of quotes

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This will match any string up to and including the first non-quoted “,”. Is that what you are wanting?

/^([^"]|"[^"]*")*?(,)/

If you want all of them (and as a counter-example to the guy who said it wasn’t possible) you could write:

/(,)(?=(?:[^"]|"[^"]*")*$)/

which will match all of them. Thus

'test, a "comma,", bob, ",sam,",here'.gsub(/(,)(?=(?:[^"]|"[^"]*")*$)/,';')

replaces all the commas not inside quotes with semicolons, and produces: 

'test; a "comma,"; bob; ",sam,";here'

If you need it to work across line breaks just add the m (multiline) flag.

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