darrinmcdougald

def ChangeOnFile(file, text_to_replace, text_to_put_in_place)
    text= File.read file
    File.open(file, 'w+'){|f| f << text.gsub(text_to_replace, text_to_put_in_place)}
end

if ARGV.length < 3
  abort "\nError: Not enough parameters supplied.\nUSAGE: #{__FILE__} InputFILE, SEARCHSTRING, REPLACESTRING\n"
else
    ChangeOnFile(ARGV[0] , ARGV[1] , ARGV[2])
end