#!/usr/bin/ruby 
# Copyright 2005 Daniel Cer (daniel.cer@cs.colorado.edu)
#
# This work is licensed under the Creative Commons Attribution-NonCommercial-
# ShareAlike License. To view a copy of this license, visit 
# http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to 
# Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 
# 94105, USA.

if ARGV.length != 2 
  $stderr.puts "Usage:\n\t#{$0} (search term) (file with list of terms)\n"
  exit -1
end

term = ARGV[0]; file_name = ARGV[1]

line_num = 0
# read in entries & then find all matching entries
matching_lines=IO.readlines(file_name).collect{|line|[line_num+=1,line.chomp]}.
  find_all{|entry|entry[1]==term }.collect{ |entry| entry[0] } 

# check to see if there are any matching entries
if matching_lines.length == 0; puts "Search term not found.\n"; exit -1; end

# display lines numbers for the matching entries
matching_lines.each { |line| puts "found match on line: #{line}" }