Question

Not sure whats going on here, or what could be the integer in this case. Here’s the code:

def build_array_from_file(filename)
    contents = []
    File.read(File.expand_path('lib/project_euler/' + filename), 'r') do |file|
      while line = file.get
        contents << line
      end
    end
    contents
  end

filename is a string and I’ve checked to make sure the path comes up valid.

Any thoughts? Thanks.

Answer 1

File.read has no second argument for mode nor block, that’s File.open:

contents_string = File.read(File.expand_path('lib/project_euler/' + filename))

Note that you can also write:

contents = File.open(path).lines # returns a lazy enumerator, keeps the file open

Or:

contents = File.readlines(path) # returns an array, the file is closed.