Print out the Regex Capture - RefactorMyCode.com

My aim: Print out the regex capture for each line of standard input

Would rather use standard shell commands for use in bash script than going into ruby.

regexp = Regexp.new(ARGV[0])

match_index = (ARGV[1] || 1).to_i

while line = $stdin.gets do
  puts regexp.match(line.chomp)[match_index]
end

Refactorings

No refactoring yet !

2 ratings. Login to rate!

grep -o  regexp filename

No rating. Login to rate!

Magic, using a variant of:

ls | grep -o "[0-9]\{1,\}"