Error while trying to use a gem

This happened to every version of source classifier I tried. I dont know whether its problem in sourceclassifier or classifier itself though. Happens everytime when I try to identify a snippet.

Stacktrace:

/Users/olegkiviljov/.rvm/gems/ruby-2.0.0-p247/gems/classifier-1.3.4/lib/classifier/bayes.rb:67:in classifications': undefined methodvalues' for nil:NilClass (NoMethodError)
from /Users/olegkiviljov/.rvm/gems/ruby-2.0.0-p247/gems/classifier-1.3.4/lib/classifier/bayes.rb:88:in classify' from /Users/olegkiviljov/.rvm/gems/ruby-2.0.0-p247/gems/chrislo-sourceclassifier-0.2.3/lib/sourceclassifier.rb:19:inidentify'
from experiment.rb:21:in `

'

[coelhudo]

I know this is an old thread. Anyhow, your problem can be solved in 2 steps.

In the example, I modified the line 4 to

s = SourceClassifier.new File.join(File.dirname(__FILE__), 'trainer.bin')

I did this because if you inspect the SourceClassifier code, you will see that it is expecting the trainer file, otherwise, it will try by default to read trainer.bin in the previous directory ('../trainer.bin').

Because I modified, the trainer.bin file needs to be in the same directory of the example. I tried to use the provided trainer.bin file but I got the same problem that you faced. So, to generate a new one you need to clone the repo and run:

rake train

After this, I got the expected output.