Re: Making a simple parser

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.dougwise.org!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!talisker.lacave.net!lacave.net!not-for-mail
From	jake kaiden <jakekaiden@yahoo.com>
Newsgroups	comp.lang.ruby
Subject	Re: Making a simple parser
Date	Sun, 17 Apr 2011 12:01:47 -0500
Organization	Service de news de lacave.net
Lines	88
Message-ID	<04ac3faa3cf24428d075625283df7645@ruby-forum.com> (permalink)
References	<87adbac7061a00a72e282c160ed42414@ruby-forum.com>
NNTP-Posting-Host	bristol.highgroove.com
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	7bit
X-Trace	talisker.lacave.net 1303059724 31693 65.111.164.187 (17 Apr 2011 17:02:04 GMT)
X-Complaints-To	abuse@lacave.net
NNTP-Posting-Date	Sun, 17 Apr 2011 17:02:04 +0000 (UTC)
In-Reply-To	<87adbac7061a00a72e282c160ed42414@ruby-forum.com>
X-Received-From	This message has been automatically forwarded from the ruby-talk mailing list by a gateway at comp.lang.ruby. If it is SPAM, it did not originate at comp.lang.ruby. Please report the original sender, and not us. Thanks! For more details about this gateway, please visit: http://blog.grayproductions.net/categories/the_gateway
X-Mail-Count	381750
X-Ml-Name	ruby-talk
X-Rubymirror	Yes
X-Ruby-Talk	<04ac3faa3cf24428d075625283df7645@ruby-forum.com>
Xref	x330-a1.tempe.blueboxinc.net comp.lang.ruby:3066

Show key headers only | View raw

hi felipe,

  well, i don't know how many possible input types you have, but if
they're not too very many, you could try a very different approach:

## for this test i created three files, "input.eng," "input.esp," and
"input.fr," each with a few lines of random text...

class Parser
  attr_reader :output
  def initialize(inputfile)
  @output = [] ## this can of course be changed to what best suits your 
purposes
  @oktypes = %W[.eng .esp .fr]
  self.checkType(inputfile)
  end

  def checkType(file)
    if File.exists?(file)
  if ! @oktypes.include?(File.extname(file))
    puts "Unrecognized File Type"
  else
    @oktypes.collect{|type|
    case
    when file.downcase.include?(type)
      self.parseInput(file)
      false
    end
    }
  end
    else
  puts "File Not Found"
    end
  end

  def parseInput(file)
    case
  when file.downcase.include?(".eng")
    self.engParse(file)
  when file.downcase.include?(".esp")
    self.espParse(file)
  when file.downcase.include?(".fr")
    self.frParse(file)
    end
  end

  def loadData(inputfile)
    @data = []
    file = File.open(inputfile, 'r')
    file.collect{|line| @data << line.chomp}
    file.close
  end

## here's where you do whatever parsing you need to, my examples are
dumb... but the important thing is that you end up with @output

  def engParse(file)
    self.loadData(file)
    @data.collect{|line|
  @output << line.reverse}
  end

  def espParse(file)
    self.loadData(file)
    @data.collect{|line|
  @output << line.upcase}
  end

  def frParse(file)
    self.loadData(file)
    @data.collect{|line|
  @output << line.upcase.reverse}
  end

end #class


test = Parser.new("input.esp")
puts test.output

  this may be WAY too simple for what you're trying to do, but hey,
maybe not! ;)

 - j

-- 
Posted via http://www.ruby-forum.com/.

Thread

Making a simple parser Felipe Balbi <balbif@gmail.com> - 2011-04-16 14:52 -0500
  Re: Making a simple parser 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-16 22:31 -0500
  Re: Making a simple parser jake kaiden <jakekaiden@yahoo.com> - 2011-04-17 12:01 -0500
    Re: Making a simple parser Felipe Balbi <balbif@gmail.com> - 2011-04-17 15:22 -0500
      Re: Making a simple parser jake kaiden <jakekaiden@yahoo.com> - 2011-04-17 21:10 -0500
  Re: Making a simple parser Jesús Gabriel y Galán <jgabrielygalan@gmail.com> - 2011-04-18 02:22 -0500
    Re: Making a simple parser Felipe Balbi <balbif@gmail.com> - 2011-04-19 16:03 -0500
  Re: Making a simple parser 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-18 13:24 -0500
    Re: Making a simple parser 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-18 15:22 -0500

csiph-web