A simple and elegant Ruby gem for string template interpolation with variable substitution.

• Simple template engine with {{variable}} syntax
• Lightweight and dependency-free
• Easy-to-use API for quick template rendering
• Support for multiple variable substitutions

Add this line to your application's Gemfile:

gem 'insider'

And then execute:

bundle install

Or install it yourself as:

gem install insider

# first and always
require 'insider'


# 1. By using including the module within a class
class MyClass
  include Insider
  attr_reader :message
  def initialize name
    @name = name
    # 2. creating an insider instance
    @message = insider("my_class_id")
  end
  def hello!
    # 3. the template can be set
    @message.template = %["Hello, {{name}}!"]
    # 4. and arguments applied
    @message.apply(name: @name)
    # 5. anywhere!
  end
end

# then, by creating a class instance
@x = MyClass.new("World")
# our insider can work.
@x.hello! => "Hello, World!"

### AND / OR ###

# Use the module directly
# 1. create an instance
@template = Insider[:my_template]
# 2. set the template
@template.template = "Hello, {{name}}!"
# 3. apply arguments
@template.apply(name: "World") => "Hello, World!"

• initialize(id) - Creates a new template with the given identifier
• template - Getter/setter for the template string
• apply(variables = {}) - Applies variable substitution to the template

• Insider[id] - Creates a new template instance with the given ID
• insider(name) - Instance method to create a new template

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/insider.

The gem is available as open source under the terms of the MIT License.