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Keep getting undefined method `length' for nil:NilClass (NoMethodError)
I have written the following code in Ruby that takes input from a user regarding plane and flight details and displays the user inputs as an array in the terminal. For example, if the user enters 3 then the program reads in input 3 times. However, I am also getting the following error:
Traceback (most recent call last): 2: from plane.rb:68:in '
1: from plane.rb:65:inmain' plane.rb:56:in print_planes': undefined methodlength' for nil:NilClass (NoMethodError)
require './input_functions' class Plane attr_accessor :id, :number, :origin, :destination def initialize (id, number, origin, destination) @id=id @number = number @origin = origin @destination = destination end end def read_plane() plane_id = read_integer("Enter plane id:") plane_number = read_string("Enter flight name:") plane_origin = read_string("Enter origin airport:") plane_destination = read_string("Enter destination airport:") plane = Plane.new() plane.id = plane_id plane.number = plane_number plane.origin = plane_origin plane.destination = plane_destination return plane end def read_planes() planes=Array.new() count=0 while (count<4) planes<<read_plane() count+=1 end end def print_plane(plane) puts ("Plane id "+plane.id) puts ("Flight "+plane.number) puts ("Origin "+plane.origin) puts ("Destination "+plane.destination) end def print_planes(planes) index = 0 while (index<planes.length) puts planes[index] index+=1 end end def main() planes = read_planes() print_planes(planes) end main()