You can think of the first block argument as an accumulator: the result of each run of the block is stored in the accumulator and then passed to the next execution of the block. In the case of the code shown above, you are defaulting the accumulator, result, to 0. Each run of the block … Read more
Install rubygems-update gem install rubygems-update update_rubygems gem update –system run this commands as root or use sudo.
You also have the shortcut option of Dir[“/path/to/search/*”] and if you want to find all Ruby files in any folder or sub-folder: Dir[“/path/to/search/**/*.rb”]
You need the SQLite3 development headers for the gem’s native extension to compile against. You can install them by running (possibly with sudo): apt-get install libsqlite3-dev
You’re looking for Enumerable#select (also called find_all): @fathers.select {|father| father[“age”] > 35 } # => [ { “age” => 40, “father” => “Bob” }, # { “age” => 50, “father” => “Batman” } ] Per the documentation, it “returns an array containing all elements of [the enumerable, in this case @fathers] for which block is … Read more
You can use the include? method: my_string = “abcdefg” if my_string.include? “cde” puts “String includes ‘cde'” end
Sorry, brief moment of synapse failure. Here’s the real answer. require ‘date’ Time.at(seconds_since_epoch_integer).to_datetime Brief example (this takes into account the current system timezone): $ date +%s 1318996912 $ irb ruby-1.9.2-p180 :001 > require ‘date’ => true ruby-1.9.2-p180 :002 > Time.at(1318996912).to_datetime => #<DateTime: 2011-10-18T23:01:52-05:00 (13261609807/5400,-5/24,2299161)> Further update (for UTC): ruby-1.9.2-p180 :003 > Time.at(1318996912).utc.to_datetime => #<DateTime: 2011-10-19T04:01:52+00:00 … Read more
Update for 2022 from TrinitronX Fast-forward to 2021 and now Bundler docs [web archive] now say to commit the Gemfile.lock inside a gem… ¯_(ツ)_/¯ I guess it makes sense for developers and ease of use when starting on a project. However, now CI jobs need to be sure to remove any stray Gemfile.lock files to … Read more
Your error comes from line: current_word ++ There’s no such syntax in Ruby. It should be: current_word += 1 What’s more, you create your regexp incorrectly. It should be: namecatcher_regex = /^[\.{1}]([A-Z]+)\.{3}/ There may be some other errors that I didn’t notice.
It’s a heredoc. http://en.wikipedia.org/wiki/Here_document#Ruby