How to extract the sign of an integer in Ruby?

Question

I need a function which returns/prints the sign on an integer. So far I came up with this:

def extract_sign(integer)
  integer >= 0 ? \'+\' : \'-\'
end
         


        

Answer 1

Here is a simple way to do it:

x = -3
"++-"[x <=> 0] # => "-"

x = 0
"++-"[x <=> 0] # => "+"

x = 3
"++-"[x <=> 0] # => "+"

or

x = -3
"±+-"[x <=> 0] # => "-"

x = 0
"±+-"[x <=> 0] # => "±"

x = 3
"±+-"[x <=> 0] # => "+"