Array.max seems to have trouble with empty strings - Cannot compare with undefined

[thomasf1]

The following code throws an "Cannot compare with undefined" error

test = ['', 'AAAA', 'hello world', 'b']
test.max('length')

This works, the issue is with the empty string:

test = ['AAAA', 'hello world', 'b']
test.max('length')

[andrewplummer]

Sorry for the delay here... this was a bug and I've put in a fix. Thanks!