CODEWITHSUNDEEP
rubyscorm
peter grill
peter grill

Reputation: 1

undefined method `gsub' for nil:NilClass ruby

i am a newbie in ruby... I'm trying to convert media into a scorm package using what i found on github but i got an error while trying to run the script in the command prompt undefined method `gsub' for nil:NilClass. I guess it may be due to a defined method. any idea on how i can remove this error ?

dir = ARGV.shift.gsub(/\/+$/, '')
index = nil
media = []
Dir["#{dir}/media/*.json"].each do |file|
  id = JSON.parse(File.read(file))
  base = file.gsub(/\/media\/.*\.json$/, '')
  index = "#{base}/index.html"
  name = File.basename file
  media.push [name,id]
  puts "#{name}: #{id}"
end

Upvotes: 0

Views: 4056

Answers (1)

Jörg W Mittag
Jörg W Mittag

Reputation: 369536

As the error says, you are calling the method gsub on an object that is an instance of NilClass, in other words you are calling gsub on nil.

The error message tells you in which method and on which line this happens and how you got to that line of code. You will have to examine the error message to find the place in your code where you are calling gsub on an object that is nil, then you have to examine your code to find out why that object is nil instead of a String as you expect it to.

Upvotes: 3

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