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Stimulus cheatsheet

Lifecycle callbacks

• initialize: once, when the controller is first instantiated
• connect: anytime the controller is connected to the DOM
• disconnect: anytime the controller is disconnected from the DOM

Action descriptors

The data-action value click->hello#greet is called an action descriptor. This particular descriptor says:

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class ArrayCalculator
  
  TEST_ONE = [-7, 1, 5, 2, -4, 3, 0]
  TEST_TWO = [-7, 1, 5, 2, -4, 3]
  
  #= calculate(:at => 3, :arr => [-7, 1, 5, 2, -4, 3, 0])
  def self.balanced?(args = {})
    raise ArgumentError unless args.has_key?(:at) and args.has_key?(:arr)
    left_sum, right_sum = 0, 0
    (0..(args[:at]-1)).each { |n| left_sum += args[:arr][n] }

ayb

require 'rubygems'
require 'sinatra'
require 'active_support'

get "/message" do 
  response = { :Say => "Hello, I am a big monkey" }
  response.to_xml(:root => 'Response')
end

post "/message" do