Delete all of the annoying .marvel indexes from Elasticsearch

clean_marvel.rb

require 'elasticsearch'
require 'optparse'

client = Elasticsearch::Client.new :host => 'localhost:9200'
indices = client.cat.indices.split("\n").collect { |i| i.split(' ')[1] }

indices.each do |index|
  if index =~ /\.marvel/
    client.indices.delete :index => index
    puts "Deleting #{index}"
  end
end

Thanks for the sharing! Although in my case (elasticsearch 1.5.0) index name is at [2] in the array, so the line reads like this:
indices = client.cat.indices.split("\n").collect { |i| i.split(' ')[2] }