Welcome to another edition of This Week in #dev, a series of posts where we bring some of our most interesting Slack conversations to the public.
Discovering Gemfile’s .tool-versions Feature for Ruby Versioning
Silumesii Maboshe discovered that the Gemfile can utilize a
.tool-versions file to specify the Ruby version:
# in Gemfile
source "https://rubygems.org"
ruby file: ".tool-versions"
Testing Block Execution in RSpec
Neil Carvalho discusses a common spec pattern for testing blocks, which involves setting a flag to true when a method is executed. He provides an example:
executed = false
object_under_test.method_under_test do
executed = true
end
expect(executed).to eq true
He mentions RSpec’s yield_control as a more elegant alternative:
expect { |b| object_under_test.method_under_test(&b) }.to yield_control
Simplifying dropdown field creation in Rails
Matheus Richard talks about the common practice of creating a
select/dropdown field from an array while generating labels using methods like
humanize or titleize. He notes that while using numbered arguments can
simplify the process, Rails’ index_by method offers an even more concise
solution:
= simple_form_for model do |f|
= f.input :options, collection: ['option_1', 'option_2'].map { |option| [option.titleize, option] }
can be improved to:
= f.input :options, collection: ['option_1', 'option_2'].index_by(&:titleize)
Thanks
This edition was brought to you by Matheus Richard, Neil Carvalho, and Silumesii Maboshe. Thanks to all contributors! 🎉
