Grails/groovy check whethere variable is Array

Question

Hi I want to find out whether a variable is an array or not

  if (params.writtenLines == ???)

much appreicated.

Answer 1

This functionality is already available in pure Java and can therefore be used in Groovy, too:

if (params.writtenLines.class.isArray())

Answer 2

More importantly, why do you want to check whether it's an array? If you know the parameter might be a single string or a list, you can now use:

def lines = params.list("writtenLines")

That came with Grails 1.2.