Class: CWG::Alphabet

Inherits:

Object

• Object
• CWG::Alphabet

show all

Defined in:

/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb

Overview

Instance Method Summary (collapse)

• - (Object) alphabet

  return string containing alphabet.

• - (Object) exclude_letters

  exclude letters passed in as string if :exclude defined.

• - (Object) generate

  generate alphabet with options acted upon == Returns: alphabet or filtered alphabet.

• - (Object) include_letters

  include letters passed in as string if :include defined.

• - (Alphabet) initialize(options = {}) constructor

  initialize class Alphabet == Parameters: options

  An optional hash containg options: :reverse - reverse alphabet :shuffle - shuffle alphabet :include - include only these letters of the alphabet :exclude - exclude these letters from the alphabet.

• - (Object) reverse_alphabet_maybe

  reverse alphabet if :reverse option defined.

• - (Object) shuffle_alphabet_maybe

  shuffle alphabet if :shuffle option defined.

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 18

def initialize(options = {})
  @options = options
end

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 24

def alphabet
  'abcdefghijklmnopqrstuvwxyz'
end

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 50

def exclude_letters
  if @options[:exclude]
    @letters.tr!(@options[:exclude],'')
  end
end

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 60

def generate
  @letters = alphabet
  include_letters
  exclude_letters
  shuffle_alphabet_maybe
  reverse_alphabet_maybe
  @letters.split('').join(' ')
end

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 42

def include_letters
  if @options[:include]
    @letters = @options[:include]
  end
end

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 30

def reverse_alphabet_maybe
  @letters.reverse! if @options[:reverse]
end

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# File '/Users/martyn/cw/cw_clone/lib/cw/alphabet.rb', line 36

def shuffle_alphabet_maybe
  @letters = @letters.split('').shuffle.join if @options[:shuffle]
end