Ruby On Rails

Tutorials

ML Basics: K Nearest Neighbors

ML Basics: K Nearest Neighbors One of the things I like about the Google Cloud Developer Advocacy team is that many of us have a similar sense of humor. Last year we had an ongoing joke about what the D.

Ruby: pass by value or pass by reference?

Ruby: pass by value or pass by reference? When developers switch to a new language, that's one of the questions they try to figure out: does it pass arguments by value or by reference? Ruby has a quite interesting answer to that question so let's find out how it works.

15 Things To Do With Ruby Awesomeness

15 Things To Do With Ruby Awesomeness 1. Make an app that texts you every time Brad Pitt tweets.2. Scrape any website on the Internet with only a few lines of code (seriously, it’s soooo easy).3. Play Hackety Hack.4. Spend your days stockpiling Gems.5. Make fancy client websites with ...

Drifting Ruby | Auditing with Paper Trail

Drifting Ruby | Auditing with Paper Trail Using the paper_trail gem, track changes to model records for auditing purposes and rollback changes when required.

Elm components in a Rails application

Elm components in a Rails application Yesterday, we saw how to use React inside our Rails app. Today we will see how simple it is to use Elm components in our Rails 5.1 application.Let's create a Rails application, and we will pass elm as a webpack parameter.

Writing a Ruby Library in Crystal

Writing a Ruby Library in Crystal I was sold because it has Ruby style syntax and you can compile it to a single binary to run anywhere similar to Go. Imagine you don’t need to install rvm, chruby or Gems, you simply compile the binary for your architecture and stick it on a serve...

Code simplicity - Command pattern

Code simplicity - Command pattern Targeting junior developers, this article shows a simple technique to declutter controllers through the addition of a simple object.

jcupitt/ruby-vips: Ruby extension for the libvips image processing library.

jcupitt/ruby-vips: Ruby extension for the libvips image processing library. This gem provides a Ruby binding for the libvips image processing library.Programs that use ruby-vips don't manipulate images directly, instead they create pipelines of image processing operations building on a source image. When the end of the pi...

Superfast CSV imports using PostgreSQL's COPY command

Superfast CSV imports using PostgreSQL's COPY command Dealing with various sources of data in web applications requires us to create services that will extract information from CSV, Excel, and other file types. In that case, it's best to use some existing libraries, or if your backend is on Rails, us...

The Limits of Copy-on-write: How Ruby Allocates Memory

The Limits of Copy-on-write: How Ruby Allocates Memory Anyone who’s run Unicorn (or Puma, or Einhorn) may have noticed a curious phenomena. Worker processes that have been forked from a master start with low memory usage, but before too long will bloat to a similar size as their parent. In a big produ...

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