Do you leave the default on a ruby gem?
Most gems contain pure Ruby code; they should simply leave the default value in place. Some gems contain C (or other) code to be compiled into a Ruby “extension”. The gem should leave the default value in place unless the code is only compiled on a certain system type. Some gems consist of precompiled code (“binary gems”).
Table of Contents
Do you have to install an extension for ruby gems?
Most of the gems are pure Ruby code. Some gems include a Ruby C extension to improve performance. This plugin is automatically created for you when you install the gem. In some cases, you may need to manually install additional software that RubyGems does not manage.
Why do you group ruby gems by environment?
This is used for gems that have a limited range. Gems that you use in a specific rake task, but don’t use in your Rails controllers and models. The benefit is that you save memory in your application code because you only load that gem when you need it. You can also group gems by environment.
How to use Gemfile and bundler in Ruby?
Useful Gem & Bundler Commands Command Description gem list Lists all installed gems. Accepts a gem which gives you the path where a gem is found. Install Gem Search. Look for gems from configured sources (def. gem env. Shows information about your gem’s environment.
What kind of executables are included in RubyGems?
Included executables can only be Ruby scripts, not scripts for other languages or compiled binaries. Extensions to compile when installing the gem, specifically the paths to the extconf.rb style files used to compile extensions. These files will be executed when the gem is installed, causing the C (or whatever) code to be compiled on the user’s machine.
Where do I find the specification class in Ruby?
The spec class contains the information for a gem. It is usually defined in a .gemspec or Rakefile, and looks like this: Gem::Specification. new do |s| yes name = ‘example’ s. version = ‘0.1.0’s. licenses = [‘MIT’] yes summary = “This is an example!” yes description = “Much longer explanation of the example!” yes
Can a Ruby version be specified at the patch level?
The Ruby version can be specified at the patch level: Prerelease versions can also be specified. Lists the external requirements (for RubyGems) that must be met for this gem to work. It is simply information for the user. The version of RubyGems used to create this gem. Do not set this, it is set automatically when the gem is packaged.