Grep in gist description and display url

grep_gist.rb

require 'net/http'
require 'uri'
require 'json'

def github(*list)
    URI('https://api.github.com/' + list.join('/'))
end

def get(uri)
    request = Net::HTTP::Get.new uri.request_uri
    Net::HTTP.start(uri.host, uri.port, :use_ssl => true) do |http|
        JSON::parse http.request(request).body
    end
end

def find_gists(user)
    get github 'users', user, 'gists'
end

def grep(user, arg)
    gists = find_gists(user)
    gists.select {|g| g['description'] =~ /#{arg}/}.map {|g| "- #{g['html_url']} : \n #{g['description']}" }
end

user = ARGV[0] 
arg = ARGV[1]

puts grep(user, arg)