Groovy adds two extra replaceAll methods to the String class. First we can pass a Pattern instead of a String argument with replaceAll(Pattern, String). And with the other method we can use a closure to replace a value found with replaceAll(String, Closure).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | def s = "Programming with Groovy is fun!"assert "Programming with Groovy rocks!" == s.replaceAll(~/is fun!/, "rocks!") // Groovy extension to String.assert "Programming with Groovy is awesome." == s.replaceAll("fun!", "awesome.") // java.lang.String.replaceAll.// Replace found String with result of closure.def replaced = s.replaceAll(/fun/) { def list = ['awesome', 'cool', 'okay'] list[new Random().nextInt(list.size())]}assert [ "Programming with Groovy is awesome!", "Programming with Groovy is cool!", "Programming with Groovy is okay!"].contains(replaced) // Use closure to replace text and use grouping. // First closure parameter is complete string and following// parameters are the groups.def txt = "Generated on 30-10-2009 with Groovy."def replacedTxt = txt.replaceAll(/.*(\d{2}-\d{2}-\d{4}).*(Gr.*)./) { all, date, lang -> def dateObj = Date.parse('dd-MM-yyyy', date) "The text '$all' was created with $lang on a ${dateObj.format('EEEE')}."}assert "The text 'Generated on 30-10-2009 with Groovy.' was created with Groovy on a Friday." == replacedTxt |
