2 Responses to “More Rails progress”

1. Colin says:

   June 6, 2010 at 4:31 pm

   I know, I sortta fell in love with Ruby looking for a better language for just general scripting and possible web development then I saw some insanely great things Ruby on Rails can do and I was sold.

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2. nick says:

   June 29, 2010 at 11:21 pm

   I’m actually writing some convenience scripts for certain tasks at work… it is so freaking easy to do things.

   For example, part of one of the scripts is generating a list of hostnames from shorthand. A lot of hosts are sequentially numbered, so people will enter host[101-200].domain.tld and it will spit out 100 lines of singular hostnames (or in this particular case, make 100 rows in a CSV for those hostnames). I don’t think there’s another language in existence that can do this in so few lines of code:

   hosts = gets.chomp
   hostname_array = Array.new
   if (host_numbers = hosts[/\[\d+-\d+\]/]).nil?
     hostname_array < < hosts
   else
     host_range = host_numbers[/(\d+)-(\d+)/,1]..host_numbers[/(\d+)-(\d+)/,2]
     host_range.each { |host_num| hostname_array << hosts.gsub(/\[\d+-\d+\]/,host_num) }
   end
   
   hostname_array.each { |hostname| puts hostname }
   

   I mean, seriously. In 10 lines of code I have taken a string from the standard input, checked to see if a pattern exists, yanked the pattern, pulled numerals out of that pattern, created a range from those numerals, iterated the range and replaced the subsection of the string with the numeral, added them all to an array, and printed each line of the array to the screen. What other language can do that in ten lines of code?

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