Array Flatten does not work (Instance variable nil)
- by Nick
I was trying to write a simple array flatten method, but it does not work using instance variable. It works only using class variables. Can anyone tell me why? and how to make it work using instance variables.
class Array
@y = []
def flatten_array
self.each do |x|
if x.class.to_s != 'Array'
@y << x
else
x.flatten_array
end
end
return @y
end
end
a = [1,2,3,4,5]
b = [6,7,8]
c = [9,10]
a1 = [12,13,a,b,c]
puts a1.inspect
b1 = a1.flatten_array
puts b1.inspect
