💡 The Tip of the Week is back – see the end of the issue for that. It covers a Ruby 2.7 feature that makes a reasonably common task a single call and I'm very glad for its addition to the language 😄
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Peter Cooper, editor | ![]() |
A More Secure Bundler: How We Fixed Our Source Priorities— Last week there was a major story where a non-malicious developer pushed libraries to public repositories with the same name as private packages and these then took precedence over the private packages several companies’ systems expected to install. Uh-oh! While RubyGems.org was safe, Bundler was affected and v2.2.10 adds a fix to prioritize block sources in Gemfiles. The Bundler and RubyGems Team |
![]() Building Fast & Modern Web Applications with Rails & Hotwire— Taking Rails to the next level with Hotwire for faster, more responsive apps. Part 1 of our introduction to the different components of Hotwire: Turbo and Stimulus. We explore how these elements work and how they can be used in your own projects. Cloud 66 sponsor |
Quick Bits - RubyGems 3.2.10 has been released which installs Bundler 2.2.10 fixing the source priority issue in the top most feature of this issue.
- RubyGems 3.2.11 quickly followed 3.2.10 (above) with a new feature to optionally fallback to IPv4 when an IPv6 network is unreachable.
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Experienced UK-Based Ruby/Rails Developer— We’re looking for a Rails dev to join our team to produce high-quality, tested code, working on an e-commerce platform that processes thousands of transactions daily. Itison |
Find Your Next Job Through Hired— Create a profile on Hired to connect with hiring managers at growing startups and Fortune 500 companies. It's free for job-seekers. Hired |
3 Tips to Tune Your VCR in Tests— VCR is a long standing tool for recording HTTP interactions and replaying them during test runs. This post shares three techniques for improving its usage. Pawel Pacana |
How to Use Sidekiq in Rails 6— A post from last year about the popular background-processing system but just updated for Rails 6.1 and Sidekiq 6.1.3 – there’s also a guide for getting it running on Heroku. Catalin Ionescu |
twterm: A Terminal UI Twitter Client— Want a day to day Twitter client on the terminal? This is one option. Packaged up with nix for easier installation if you’re a nix user. Ryota Kameoka |
Rpush 5.4: A Push Notification Service for Ruby— A long standing project. Rpush supports numerous push notification services including those from Apple, Firebase, and Amazon, and this new release adds Ruby 3 and Rails 6.1 support. Ian Leitch |
💡 Tip of the Week Tallying and Counting Counting is one of the many things computers do better than humans. Ruby's Enumerable#tally, introduced in Ruby 2.7, makes counting even more straightforward. It counts the occurences of each element in a collection, and returns a hash whose keys are all of the distinct elements in the collection, and whose values are the number of times each key appears. Pre Ruby 2.7, if we wanted a hash which gave us counts of the elements in a collection, there were a few less straightforward ways we could do it. One example of code we might have written is: |
[1, 2, 0, 2, 2, 3, 2, 1, 3].group_by(&:itself).transform_values(&:size)
=> {1=>2, 2=>4, 0=>1, 3=>2}
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Luckily, we now have Enumerable#tally which makes this same functionality cleaner to write and easier to read. Let's look at a couple of examples: |
[1, 2, 0, 2, 2, 3, 2, 1, 3].tally
=> {1=>2, 2=>4, 0=>1, 3=>2}
%w(r u b y w e e k l y).tally
=> {"r"=>1, "u"=>1, "b"=>1, "y"=>2,
"w"=>1, "e"=>2, "k"=>1, "l"=>1}
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As we can see, the keys are the elements in each array, and the values are their counts. If we were only interested in the number of times a specific element appeared in an Enumerable, we could also use Enumerable#count which takes an element as a parameter. For example: |
[1, 2, 0, 2, 2, 3, 2, 1, 3].count(1)
=> 2
[1, 2, 0, 2, 2, 3, 2, 1, 3].count(5)
=> 0
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Hopefully Enumerable#tally and Enumerable#count help with any Ruby counting needs! This week’s tip was written by Jemma Issroff. |
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