Question

I want to read regular expressions from a external file in Ruby. For example, I want to substitute a big string loading every regex from a file and running gsub for each. Each regex is separated by newlines on the file.

The external file would be like this:

engenharia d[ae] computação
ci[êe]ncias? d[ae] computação

Is it possible?

Answer 1

Sure! You can create a regex simply by using Regex.new "my string". To put it together with reading a file:

regexen = []
File.open("myfile.txt", "r") do |f|
  while line = f.gets.chomp
    regexen << Regexp.new line
  end
end