Hi Guy Just assign the variable
def comapreVersions = { a,b -> return getVersion(a).toInteger() <=> getVersion(b).toInteger() } and then use it in your sort: list.sort(compareVersions) Best regards, Søren Berg Glasius GR8Conf Europe organizing team GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem From: Guy Matz <guym...@gmail.com> Reply: users@groovy.apache.org <users@groovy.apache.org> Date: May 16, 2016 at 17:28:34 To: users@groovy.apache.org <users@groovy.apache.org> Subject: re-using a comparison closure Hi! I have to sort a list of strings based on a number within the string . . . I am able to sort using something like: list.sort( { a,b -> getVersion(a) <=> getVersion(b)}) I need to use this in a bunch of places in my code and was hoping to replace it with a method, like: list.sort( compareVersions) with compareVersions: def compareVersions(a, b) { return getVersion(a).toInteger() <=> getVersion(b).toInteger() } putting the method (compoareVersions) into the sort as a param doesn't work. Anyone know what I'm missing? Thanks!! Guy