easy-going-rails/app/helpers/icon_helper.rb

# Font Awesome Helper
module IconHelper
  def fa_icon(name, html_options = {})
    html_options[:style] ||= :solid
    html_options['aria-hidden'] ||= true

    content_class = "fa-#{html_options[:style].to_s.dasherize} fa-#{name.to_s.dasherize}"
    content_class << " fa-#{html_options[:size].to_s.dasherize}" if html_options.key? :size
    content_class << " #{html_options[:class]}" if html_options.key? :class

    tag.i(class: content_class, 'aria-hidden': html_options['aria-hidden'])
  end
end