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
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.
Try this: array.reverse.inject(value) { |assigned_value, key| { key => assigned_value } } #=> {“this”=>{“is”=>{“a”=>{“test”=>42}}}}
the rails console never writes to the log file, but you can achieve it quite easily, for example, if you execute following after starting the rails console ActiveRecord::Base.logger = Logger.new STDOUT rails will log all SQL statements to stdout, thus display them in your terminal. and since Logger.new accepts any stream as first argument, you … Read more
Distance between two coordinates on earth is usually calculated using Haversine formula. This formula takes into consideration earth shape and radius. This is the code I use to calculate distance in meters. def distance(loc1, loc2) rad_per_deg = Math::PI/180 # PI / 180 rkm = 6371 # Earth radius in kilometers rm = rkm * 1000 … Read more
I faced this problem when I moved my project to another PC running a different version of JRuby. resolution: close RubyMine delete .idea/ folder re-open project in RubyMine
Interesting question; something that I want to know more about as well…. So dug in a bit, and here is what I uncovered: Thoughtbot style guide dictum about let, etc. In an earlier version of the style guide, there’s more to that statement: Avoid its, let, let!, specify, subject, and other DSLs. Prefer explicitness and … Read more