Setting default local variables value in Ruby
Complementing this post from Ruby Quicktips
If you want to ensure that a local variable has a value, you can do so:
>> somevar
NameError: undefined local variable or method `somevar' for main:Object
from (irb):1
>> somevar = somevar || "somevalue"
=> "somevalue"
but if you try to set another variable, using a value of a variable that may not exists, you will get an error:
>> somevar
NameError: undefined local variable or method `somevar' for main:Object
from (irb):1
>> someothervar = somevar || "somevalue"
NameError: undefined local variable or method `somevar' for main:Object
from (irb):2
