Ruby On Rails

Tutorials

Optimizing MemoWise Performance

Optimizing MemoWise Performance There’s a new gem in town! It’s a memoization gem called MemoWise (pun very much intended) and we think it’s the best way to memoize methods in Ruby. This post covers how we made it so fast, and you can also read our other posts about its origin s...

The Gnar Blog - Validate CSV Input With ActiveModel::Validations

The Gnar Blog - Validate CSV Input With ActiveModel::Validations We're maintaining a system that tracks information about books, including their publication dates. On occasion, publishers will send us CSVs with updated publication dates, and we need to update our Rails application to have those dates.We want a ...

6 Complex Ruby Transformations made simple with Dry::Transformer

6 Complex Ruby Transformations made simple with Dry::Transformer I often work with hashes in plain ruby, especially when I prepare standalone scripts or gem packages, and there were plenty of situations where I needed to do some simple, or more complex data transformations to achieve the expected output.In the ...

Gems, Plugins, Engines, and Mountable Engines: 4 ways to make a Gem.

Gems, Plugins, Engines, and Mountable Engines: 4 ways to make a Gem. Every time I go to make a new ruby gem, I need to look up the specific way to get started. Here’s a summary of the different options.

A Comparison of Ruby Version Managers for macOS - SitePoint

A Comparison of Ruby Version Managers for macOS - SitePoint Folks who are new to Ruby are delighted to discover that Ruby comes pre-installed on macOS. They’re often disappointed when a more experienced developer tells them, “Don’t use the Mac system Ruby.” I’ve written elsewhere about the reasons. In shor...

Simple memoization with Ruby

Simple memoization with Ruby We have some service that does time-consuming call to fetch external id for the given user:.

Get element index when using map

Get element index when using map When using map, you would like to access the index of element, instead of fetching the index:.

Avoid using unless condition with Rails

Avoid using unless condition with Rails Avoid using unless condition as it makes the code less readable, especially when using it with the present? or blank? methods provided by Rails.

Execute raw SQL with Rails

Execute raw SQL with Rails If you would like to execute SQL query without using the Rails model, you can do this in the following way:.

Check numbers in Ruby way

Check numbers in Ruby way If you want to check a number if it is zero, greater than, or less than zero, you can use built-in methods instead of standard comparison.

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