As you’ve already discovered, self does not refer to the object where IRB was started, but to the TOPLEVEL_BINDING, which seems to be an instance of the Object class itself. You can still run an IRB session with a specific class or object as the context, but it’s not as simple as just starting IRB. … Read more
Set the TZ environment variable… $ ruby -e ‘puts Time.now’ Sat Jan 15 20:49:10 -0800 2011 $ TZ=UTC ruby -e ‘puts Time.now’ Sun Jan 16 04:49:20 +0000 2011 Ruby gets the time zone information from the host’s operating system. Most directly, it uses a C library API specified by C99 and Posix. The implementation of … Read more
Isn’t the solution you are looking for just: require ‘socket’ addr_infos = Socket.ip_address_list Since a machine can have multiple interfaces and multiple IP Addresses, this method returns an array of Addrinfo. You can fetch the exact IP addresses like this: addr_infos.each do |addr_info| puts addr_info.ip_address end You can further filter the list by rejecting loopback … Read more
None of these worked for me, but this did: irb -I . >require ‘file’ => true
Here’s one way: class String def valid_float? # The double negation turns this into an actual boolean true – if you’re # okay with “truthy” values (like 0.0), you can remove it. !!Float(self) rescue false end end “a”.valid_float? #false “2.4”.valid_float? #true If you want to avoid the monkey-patch of String, you could always make this … Read more
Actually, this is much simpler: require ‘rubygems’ require ‘nokogiri’ puts Nokogiri::HTML(my_html).text You still have line break issues, though, so you’re going to have to figure out how you want to handle those yourself.
You can do array differences, if the result is the empty array, the 2 arrays contained the same elements: >> [1,2,3]-[3,1,2] #=> [] If you still have elements left, then not all elements of the first array were present in the second one: >> [1,2,5]-[3,1,2] #=> [5]
I have already fixed it. The solution was to change gem ‘factory_girl’ to gem ‘factory_girl_rails’ in my Gemfile.
Try this it worked for me: RAILS_ENV=production rake db:drop DISABLE_DATABASE_ENVIRONMENT_CHECK=1 in a single line.
It’s simple to spend the three minutes (maybe two if you type fast) to add a swap file to your server. If you’re running Ubuntu (not sure how well this works for other Linux flavors), just follow this tutorial from DigitalOcean: https://www.digitalocean.com/community/articles/how-to-add-swap-on-ubuntu-12-04 Voila!