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

Instead of the accepted answer passwordNotEmpty = !!password you can use

passwordNotEmpty = if password then true else false

It gives the same result (the difference only in syntax).

In the first column is a value, in the second is the result of if value:

0 - false
5 - true
'string' - true
'' - false
[1, 2, 3] - true
[] - true
true - true
false - false
null - false
undefined - false