Chapter 2 Linked lists Upside: are memory efficient (no need to reallocate the list if an element is added). Downside: It is only (mostly?) good for iterating through all elements.... Read more »

Some thoughts Bitmap index scan - Uses index Bitmap hash scan - No index Indexes are sorted lists PG (and maybe other DBMS) has the concept of pages A page... Read more »

This is an entry written on a weekend, in a rush, just as an attempt to raise awareness about a common practice in the ruby world. I am a big... Read more »

Sometimes applications won’t respond to json requests with json responses. If that is the case for production, that is a bug. But sometimes, in development environment, developers leave unknown exceptions... Read more »

Error installing mysql gem bundle config --global build.mysql2 --with-opt-dir="$(brew --prefix openssl)" source Bundler Traceback (most recent call last): 2: from /Users/marcelojacobus/.asdf/installs/ruby/2.5.3/bin/bundle:23:in `<main>' 1: from /Users/marcelojacobus/.asdf/installs/ruby/2.5.3/lib/ruby/2.5.0/rubygems.rb:308:in `activate_bin_path' /Users/marcelojacobus/.asdf/installs/ruby/2.5.3/lib/ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find... Read more »

Here it goes brew tap homebrew/homebrew-php brew install php72 brew install homebrew/php/php72-xdebug export PATH="$PATH:`brew --prefix php`" Read more »

Sometimes, while running specs with spring preloader, I got the warnings that some times led to erros, like follows: ./bin/rspec spec/some/class_spec.rb:12 WARN: Unresolved specs during Gem::Specification.reset: spring (>= 0.9.1) WARN:... Read more »

If this did not work… Project ERROR: Xcode not set up properly. You may need to confirm the license agreement by running /usr/bin/xcodebuild. current directory: /Users/marcelo.jacobus/.gem/ruby/2.3.5/gems/capybara-webkit-1.15.0 /Users/marcelo.jacobus/.rubies/ruby-2.3.5/bin/ruby -r ./siteconf20180320-92074-jgag5q.rb extconf.rb... Read more »

Note: Also, the bellow exemples are not complete. They are only pseudo code and there could be improvements to that. These are the solid principles Single responsibility principle - a... Read more »

This is only a draft. Here are some links I want to explore https://medium.com/@vsavkin/hexagonal-architecture-for-rails-developers-8b1fee64a613#.niwmr5bhm https://martinfowler.com/articles/badri-hexagonal/ http://mikepackdev.com/blog_posts/24-the-right-way-to-code-dci-in-ruby http://archive.oreilly.com/pub/a/ruby/excerpts/ruby-best-practices/worst-practices.html https://www.quora.com/What-are-some-worst-practices-for-Ruby-on-Rails-applications http://daniel.fone.net.nz/blog/2013/05/28/why-you-should-never-rescue-exception-in-ruby/ https://www.sitepoint.com/10-ruby-on-rails-best-practices/ https://github.com/jimweirich/wyriki https://github.com/hanami/model/issues/240#issuecomment-140703858 Read more »

Here is how you get the pid: lsof -i tcp:8080 -t Read more »

I often extract code I use into libraries so I can reuse them. Creating a new library is a bit overwhelming since there is plenty of boilerplate code to write,... Read more »

The first edition of DDD Europe took place in Belgium, during January 26th to the 29th. Thanks to Goodgame Studios, the five of us Gregor, Marco, Marius, Oliver and myself... Read more »

So last weekend I attended DDD Europe. Thanks to Marco Muths. Here is a summary from someone on the internet. Event sourcing and Stream processing at scale Arm yourself with... Read more »

You can achieve autocompletion like the cool IDEs (such as PHPStorm or NetBeans) by using the built in omni completion. How you do that? Go to the variable you want... Read more »

I was getting this error in Travis CI. 1) Jobs Management when user is not logged he publishes a job Failure/Error: visit root_path Rack::Timeout::RequestTimeoutError: Request ran for longer than 15000ms... Read more »

Moving fotos and videos from ipad/iphone to the computer Applications > Image Capture Read more »

All right. So here I will post some new vocabulary and notes of things I want to master to improve the language. Phrasal verbs Read more »

Say you want to be able to access a web server in a remote unix but port 80 is not exposed to the world. Still, you have ssh access to... Read more »

I was not able to compile gems. The reason was XCode needed me to agree with its new license. Solution: Open XCode. Agree with the new license. bundle install Read more »