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I have a comma separated list of strings like the one below.
a,b ,c ,d, , , , ,e, f,g,h . I want to write a regular expression that will replace the empty values i.e., strings that contain only white spaces to ‘NA’. So the result should be
a,b ,c ,d,NA,NA,NA,NA,e, f,g,h . I tried using ‘,\s+,’ to search but it skips the alternate empty strings and results in
a,b ,c ,d,NA, ,NA, ,e, f,g,h . What’s the correct regex to use here ?
(?<=,)\s+(?=,)This is a lookbehind for a comma, then whitespace, then a lookahead for a comma