Easiest way to check if string is null or empty

Question

I\'ve got this code that checks for the empty or null string. It\'s working in testing.

eitherStringEmpty= (email, password) ->
  emailEmpty = not email? or          


        

Answer 1

This is a case where "truthiness" comes in handy. You don't even need to define a function for that:

test1 = not (email and password)

Why does it work?

'0'       // true
'123abc'  // true
''        // false
null      // false
undefined // false