Class: Dictionary

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-dictionary/word_path.rb,
lib/ruby-dictionary/dictionary.rb

Defined Under Namespace

Classes: WordPath

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(word_list) ⇒ Dictionary

Returns a new instance of Dictionary.



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# File 'lib/ruby-dictionary/dictionary.rb', line 7

def initialize(word_list)
  @word_path = parse_words(word_list)
end

Class Method Details

.from_file(path, separator = "\n") ⇒ Object 



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# File 'lib/ruby-dictionary/dictionary.rb', line 45

def self.from_file(path, separator = "\n")
  contents = case path
               when String then File.read(path)
               when File then path.read
               else raise ArgumentError, "path must be a String or File"
             end

  if contents.start_with?("\x1F\x8B")
    gz = Zlib::GzipReader.new(StringIO.new(contents))
    contents = gz.read
  end

  new(contents.split(separator))
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/ruby-dictionary/dictionary.rb', line 33

def ==(obj)
  obj.class == self.class && obj.hash == self.hash
end

#exists?(word) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby-dictionary/dictionary.rb', line 11

def exists?(word)
  path = word_path(word)
  !!(path && path.leaf?)
end

#hash ⇒ Object 



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# File 'lib/ruby-dictionary/dictionary.rb', line 29

def hash
  self.class.hash ^ @word_path.hash
end

#inspect ⇒ Object 



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# File 'lib/ruby-dictionary/dictionary.rb', line 37

def inspect
  "#<#{self.class.name}>"
end

#starting_with(prefix) ⇒ Object 



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# File 'lib/ruby-dictionary/dictionary.rb', line 16

def starting_with(prefix)
  prefix = prefix.to_s.strip.downcase
  path = word_path(prefix)
  return [] if path.nil?

  words = [].tap do |words|
    words << prefix if path.leaf?
    words.concat(path.suffixes.collect! { |suffix| "#{prefix}#{suffix}" })
  end

  words.sort!
end

#to_s ⇒ Object 



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# File 'lib/ruby-dictionary/dictionary.rb', line 41

def to_s
  inspect
end