Check whether a variable is an Array

Question

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

  if (params.writtenLines == ???)

Much appreciated.

Peter Ledbrook · Accepted Answer · 2010-06-02 09:15:53Z

37

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.

answered Jun 2, 2010 at 9:15

Peter Ledbrook

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Comments

Christoph Metzendorf · Accepted Answer · 2010-06-01 15:17:50Z

13

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

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

answered Jun 1, 2010 at 15:17

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Thanks dude, I found this as well if ( params.writtenLineID.getClass().isArray()) Keep up the good work cheers.

piotr.d · Accepted Answer · 2011-09-01 13:05:26Z

5

I realize this is a bit late, but what about this:

List.isCase(params.writtenLines)

Wouldn't it be a correct solution, too?

answered Sep 1, 2011 at 13:05

piotr.d

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