Ruby noob

Ruby
1

Hi,

I would like to parse a very simple html(index_msg.htm) file described
below :

WM_ACTIVATE 0x0006 0x0000 WM_NULL WM_ACTIVATEAPP 0x001C 0x0001 WM_CREATE ... I would like to parse this file and to extract information like this :

enum foo
{
eWM_ACTIVATE = 0x0006,
eWM_ACTIVATEAPP = 0x0001,
…
};

I am starting with this :

fileIn = File.open(“C:/WIKI_CE/index_msg.htm”, “r”)
fileOut = File.new(“C:/WIKI_CE/enumWmMsg.h”, “w”)

begin
while (line = fileIn.readline)
line.chomp
$stdout.print line
end
rescue EOFError
fileIn.close
fileOut.close
end

but now I am stuck. Should I use regex or how can I compare two string ?

2

mosfet wrote:

WM_NULL

fileIn = File.open(“C:/WIKI_CE/index_msg.htm”, “r”)
end
This should get you started:

=====================================================================
require ‘rubygems’
require ‘scrubyt’

data = Scrubyt::Extractor.define do
fetch(‘input.html’)

record do
var_name ‘WM_ACTIVATE’
code ‘0x0006’
end
end

result = data.to_xml.to_s
names = result.scan(/var_name>(.+?)</var_name/).flatten
values = result.scan(/code>(.+?)</code/).flatten
pairs = names.zip(values)

pairs.each do |name, value|
puts “e#{name} = #{value}”
end

The XML to array code kind of sucks, in the next version of scRUBYt! you
will be able to output the result directly to a hash (or CSV or YAML or
some other, more friendly format for such a task).

Cheers,
Peter
__
http://www.rubyrailways.com :: Ruby and Web2.0 blog
http://scrubyt.org :: Ruby web scraping framework
http://rubykitchensink.ca/ :: The indexed archive of all things Ruby

3

On 3/5/07, mosfet [email protected] wrote:

WM_NULL

fileIn = File.open(“C:/WIKI_CE/index_msg.htm”, “r”)
end

but now I am stuck. Should I use regex or how can I compare two string ?

  1. have a look at hpricot
  2. if it’s too big for you use regexen with /m flag, and use
    Regex#scan():

REGEX = /\s*

(.*?)<\/td>\s* (.*?)<\/td> (.*?)<\/td> (.*?) (.*?) <\/tr>/xm

file_in = File.read(“C:/WIKI_CE/index_msg.htm”)
File.open(“C:/WIKI_CE/enumWmMsg.h”, “w”) do |file_out|
file_in.scan(REGEX) do
file_out.puts $1, $2, $3, $4, $5
end
end
end

Notes:

  1. we_use_snake_case_for_variable_names
  2. Use File.open with block to automatically close the file
  3. You’ll have the values in $1…$5
  4. It seems you are inconsistent - in the first example you chose the
    second line, in the other the fourth one.

In any case, Peter’s approach will be easier, and more stable.