Find a specific text segment within a file and than search for specific line in ruby

Question

I'm trying to find a specific text segment within a text file and than a specific line within the text segment. The algorithm should be as follow:

1)First, search for a line which contains the keyword "Macros"

2)The next found line must contain the keyword "Name"

3)And finally print me the next line

As pseudo code I mean something like this:

File.open(file_name) do |f|
  f.each_line {|line|
    if line.include?("Macros")
      and if next line.include?("Name")
        print me the line after
    end

Any suggestions?

Answer 1

I would use boolean flags to remember that I already matched the parts of the condition:

File.open(file_name) do |file|
  marcos_found = false
  name_found   = false

  file.each_line do |line|
    if line.include?('Macros')
      marcos_found = true 

    elsif found_marcos && line.include?("Name")
      name_found = true

    elsif marcos_found && name_found
      puts line
      break # do not search further or print later matches
    end
  end
end