Rails views: .html.haml vs .haml / html.erb vs erb

Normally I use the .haml extension for my views. Today while working on one Rails app I have learned why in some cases one cannot just use .haml.

	class Contacts::ApplicationController
	respond_to :json, :html
	def index
	respond_with Contacts.all
	end
	end

view raw gistfile1.rb hosted with ❤ by GitHub

Given the above controller, if you just use .haml instead of .html.haml every response will be rendered using that .haml template.

Initially I had created app/views/contacts/index.haml for responding to html requests.
After I changed 'repond_to :html' to 'respond_to :html, :json' -- I was confused when I saw an HTML response when fetching '/contacts.json'.

Renaming 'app/views/contacts/index.haml' to index.html.haml' solved the problem, Rails no longer used index.haml to render the JSON response.

Static methods or class methods in Ruby and Python

Today when learning how to define a class method in Ruby I was curious how would I do that in Python. Here I have demonstrated how static/class methods look in these languages.

Ruby

	class Greeter
	def self.say_hi name
	puts "Hi #{name}."
	end
	end
	=begin
	Output:
	irb(main):007:0> Greeter.say_hi 'Ruby'
	Hi Ruby.
	=end

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Python

	class Greeter:
	@staticmethod
	def say_hi(name):
	print ('Hi %s.') % name
	#Output:
	# Greeter.say_hi('Python')
	# >> Hi Python.

view raw gistfile1.py hosted with ❤ by GitHub