TILs - Fueling Curiosity, One Insight at a Time

This accessibility cheatsheet is pretty good https://bitsofco.de/the-accessibility-cheatsheet/

don't use new webpack.optimize.ModuleConcatenationPlugin() in development env, causes memory leak in webpack 3 and build fails

rspec-rails will lazy load puma from version 3.7.1

[ANN] used in mailing list is an abbreviation of 'Announcement'

https://eli.thegreenplace.net/2006/04/18/understanding-ruby-blocks-procs-and-methods covers very basic and interesting stuff.

gitlab does triple dot for compare instead of double dot

Sometimes we may need to create a new github/bitbucket account for a new client project. Because we've already linked out laptop's SSH key to our original account, we can't link it again to this new account. In such cases, instead of using tools to switch ssh keys, you can generate a keypair just for this project and set an environment variable GIT_SSH_COMMAND='ssh -i new_ssh_keys_dir/id_rsa' and run git commands like usual. Bonus tip: Use direnv to automatically load this environment variable when navigating to the project directory.

Rails encrypted secrets https://www.engineyard.com/blog/encrypted-rails-secrets-on-rails-5.1

MySQL does not support transactional ddl. https://dev.mysql.com/doc/refman/5.7/en/cannot-roll-back.html

Omniauth setup phase - request time modification of strategy https://github.com/omniauth/omniauth/wiki/setup-phase

You can create a multiline regex in Elixir using r""" for example:


```

assert yml_file_content =
~r"""
foo:
environment:
- VIRTUAL_HOST=[a-z]{10}.127.0.0.1.xip.io
bar:
environment:
VIRTUAL_HOST: [a-z]{10}.127.0.0.1.xip.io
"""

```

The best way to parse time is to use Time.zone.parse (which will use the time zone specified in config.time_zone) instead of just Time.parse (which will use the computer’s time zone) courtesy: https://www.varvet.com/blog/working-with-time-zones-in-ruby-on-rails/

capistrano3-puma has become so advanced that it can now generate nginx configuration https://github.com/seuros/capistrano-puma#nginx This is so helpful!

from ps man pages, if you want to list pids of particular process just use ps -C <process-name> -o pid=. Damn handy when it comes to looping and killing processes

Rails delegate http://www.rubydoc.info/gems/rubocop/RuboCop/Cop/Rails/Delegate

in js the default sort order is according to string Unicode code points, source https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/sort (shrug)

Rails prepend_before_action to chain before action callbacks.

ActiveSupport::Autoload helps to require the file and loads only when needed