From: nosuzuki@... (Norio Suzuki)
Date: 1999-08-10T16:20:45+09:00
Subject: [ruby-list:16035] Re: String.completion (Re: debug.rb in Ruby 1.3.7)

こんにちは。鈴木教郎です。

原さんのコードに刺激されて、こんなの書いてみました。

始めに相補する単語から hash をつくっておくという方法です。

#!/usr/local/bin/ruby 
class Completion
  def initialize(list)
    # var for completion items.
    @complete_list = {}

    # check each list item
    list.each{|word|
      print "#{word} ->\n" if $DEBUG

      # match from head to make completion list
      for letter_counter in 1 .. word.size
	letter = word[0,  letter_counter]
	print "\t#{letter} -> " if $DEBUG

	# skip if already checked
	if @complete_list[letter]
	  print "skipped\n" if $DEBUG
	  next
	end

	# make comletion list
	array = []
	list.each{|item|
	  if item =~ /^#{letter}/
	    array.push(item)
	  end
	}
	@complete_list[letter] = array
	print "matched to ", array.join(", "), "\n" if $DEBUG
      end
    }

  end

  def complete(key)
    @complete_list[key]
  end
end

list = Completion.new(["when", "which", "what", "where", "who", "how"])

while true
  print "INPUT: "
  item = readline.chop
  result = list.complete(item)
  if result
    print "#{item} -> ", result.join(", "), "\n"
  else
    print "no item #{item}\n"
  end
end
-- 
鈴木教郎
E-Mail: nosuzuki@e-mail.ne.jp