example

example.rb

# Define a method that takes a path to a file and returns an array of all words therein
def read_words( filename )
  # Read in the contents of the file and split it into
  # an array of strings by finding (and discarding) any "whitespace"
  # (spaces, tabs, newlines)
  File.read(filename).split(/\s+/)
end

# Define a method that takes an array of words and returns an array without any 'junk' words
def remove_useless_words( all_words )
  useless_words = ["word1", "word2"]
  all_words - useless_words # Last expression in the method is what it returns
end

# Call the 'read_words' method, passing in a string as the argument
# Save the resulting array of words in a variable named "words"
words = read_words "filename.txt"

# Now, call the 'remove_useless_words' method, passing that array in
# Save the resulting array in a variable named "good_words"
good_words = remove_useless_words( words )