Download - The Bastards Book of Regular Expressions

Data Cleaning with the Stars 132[GMNPRUX][ACGR]?(?:-\d{2})?Finally, we have the title. This seems like the trickiest part, since the titles can be of variable lengthand contain any type of character, including punctuation.However, this should work for our purposes:^.+?Why does this work? The .+? regex seems like it would inadvertently scoop up non-title parts ofthe line. Luckily for us, the rest of the line’s data points are more or less consistently. Whateverthe dot-plus swallows, it has to leave a minimum of structured fields in the right most part of thepattern.So even if we have a movie named “X X 9 1999”, with a rating of “R”, a user rating of “8”, and aproduction year of “2000”:X X 9 1999 R 8 2000The title-capturing part of the regex would stop at 1999 because it has to leave at least one ratingtypepattern (R), one user-rating-type pattern (8), and a four-digit number at the very end (2000).All together now:Find ˆ(.+?) ([GMNPRUX][ACGR]?(?:-\d{2})?) (\d\.?\d?) (\d{4})$Replace \1\t\2\t\3\4Or, if you prefer comma delimited style: "\1","\2","\3","\4"“The Godfather: Part II”,”R”,”9”,”1974” “Pulp Fiction”,”R”,”8.9”,”1994” “8½”,”NR”,”8.1”,”1963” “TheGood, the Bad and the Ugly”,”R”,”8.9”,”1966” “12 Angry Men”,”PG”,”8.9”,”1957” “The DarkKnight”,”PG-13”,”8.9”,”2008” “1984”,”R”,”7.1”,”1984” “M”,”NR”,”8.5”,”1931” “Nosferatu”,”U”,”8”,”1922”“Schindler’s List”,”R”,”8.9”,”1993” “Midnight Cowboy”,”X”,”8”,”1969” “Fight Club”,”R”,”8.8”,”1999”