Module: FindSharedLines

Defined in:
lib/find_shared_lines.rb,
lib/find_shared_lines/version.rb,
lib/find_shared_lines/command_line_interface.rb

Defined Under Namespace

Modules: CommandLineInterface Classes: Error

Constant Summary collapse

VERSION = 
'0.1.0'

Class Method Summary collapse

Class Method Details

.exclude_shared_lines(files) ⇒ Object 



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# File 'lib/find_shared_lines.rb', line 23

def self.exclude_shared_lines(files)
  reduce(files) { |first_file, file| first_file - file }
end

.join(files) ⇒ Object 



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# File 'lib/find_shared_lines.rb', line 31

def self.join(files)
  reduce(files) { |first_file, file| first_file | file }
end

.read_file_into_set(file) ⇒ Object 



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# File 'lib/find_shared_lines.rb', line 13

def self.read_file_into_set(file)
  Set.new(read_lines_from(file))
end

.read_lines_from(file) ⇒ Object 



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# File 'lib/find_shared_lines.rb', line 9

def self.read_lines_from(file)
  File.open(file).readlines.map(&:chomp)
end

.reduce(files) ⇒ Object 



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# File 'lib/find_shared_lines.rb', line 17

def self.reduce(files)
  first_file, *rest = files
  first_set = read_file_into_set(first_file)
  rest.reduce(first_set) { |acc, file| yield acc, read_file_into_set(file) }
end

.shared_lines(files) ⇒ Object 



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# File 'lib/find_shared_lines.rb', line 27

def self.shared_lines(files)
  reduce(files) { |first_file, file| first_file & file }
end