fa_icon desymbolize

app/helpers/icon_helper.rb

@@ -1,13 +1,18 @@
 # Font Awesome Helper
 module IconHelper
+  # accept name without 'fa-' prefix, style: (solid by default), size:, class: and 'aria-hidden':
   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 = "fa-#{unsymbolize(html_options[:style])} fa-#{unsymbolize(name)}"
+    content_class << " fa-#{unsymbolize(html_options[:size])}" 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
+
+  private
+
+  def unsymbolize(symbol) = symbol.to_s.dasherize
 end