Fueling Curiosity, One Insight at a Time

about ActiveSupport::Notifications there is a railscasts on it http://railscasts.com/episodes/249-notifications-in-rails-3

In javascript generally if you reduce an array it starts from 0th element and goes till the end but if you want to run the reduce from right to left of an array i.e. start from last element and go till the first element use arr.reduceRight

In order to know hierarchy of translations, print defaults here https://github.com/rails/rails/blob/v5.1.4/activemodel/lib/active_model/errors.rb#L405 and see the magic!

flash.now in rails, which allows you to have flash messages which does not persists across subsequent action unlike regular flash i.e it sets a flash message which is available only to the current action and not for next. http://api.rubyonrails.org/v5.1/classes/ActionDispatch/Flash/FlashHash.html#method-i-now

[RealWorld](https://github.com/gothinkster/realworld) is a project that curates a list of implementations of frontends and backends in different frameworks for the same application spec . This is a great way to understand how to build non-trivial features when getting started with a new framework.

ActiveRecord Query method - none. It returns a chainable relation with zero records. Post.none => #

active record inspect method is invoked to log the active record collection object to the rails console which by default limits the query by 11 but does not actually limit the query being executed.

Firefox exposes about:crashes url where one can see history of crash reports. Clicking on each crash report takes to mozilla website where one can see crash details

we can tell the browser how to execute the script. By default, browser runs the script immediately by pausing HTML parsing. Else you can specify async or defer with the script tag to either run script asynchronously or defer it until HTML is parsed.