ruby - What is the best way to delimit a csv files thats contain commas and double quotes? -


lets have following string , want below output without requiring csv.

this, "what need", to, do, "i, want, this", to, work  need i, want, work

this problem classic case of technique explained in question "regex-match pattern, excluding..."

we can solve beautifully-simple regex:

"([^"]+)"|[^, ]+

the left side of alternation | matches complete "quotes" , captures contents group1. right side matches characters neither commas nor spaces, , know right ones because not matched expression on left.

option 2: allowing multiple words

in input, tokens single words, if want regex work my cat scratches, "what need", dog barks, use this:

"([^"]+)"|[^, ]+(?:[ ]*[^, ]+)*

the difference addition of (?:[ ]*[^, ]+)* optionally adds spaces + characters, 0 or more times.

this program shows how use regex (see results @ bottom of online demo):

subject = 'this, "what need", to, do, "i, want, this", to, work' regex = /"([^"]+)"|[^, ]+/ # put group 1 captures in array mymatches = [] subject.scan(regex) {|m|      $1.nil? ? mymatches << $& : mymatches << $1 } mymatches.each { |x| puts x }

output

this need i, want, work

reference


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