A simple way to attach JS behaviour to the DOM. UJS is eliminating JS from writing it inline in our HTML.
For the laymen: http://stackoverflow.com/questions/4478795/what-is-unobtrusive-javascript-in-layman-terms
Instead of this:
<a href='#' onClick="alert('Surprise')"></a>
| <!doctype html> | |
| <html> | |
| <head> | |
| <link rel="stylesheet" href="http://cdn.jsdelivr.net/normalize/2.1.0/normalize.css"> | |
| <link rel="stylesheet" href="main.css"> | |
| <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Open+Sans:300,400,600,700,800"> | |
| <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Lato:100,900"> | |
| <link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/3.0.2/css/font-awesome.min.css"> | |
| </head> |
| class Vehicle | |
| attr_accessor :wheels | |
| attr_reader :status | |
| def initialize(args) | |
| @color = args[:color] | |
| @wheels = args[:wheels] | |
| end |
| class Car | |
| @@WHEELS = 4 | |
| def initialize(args) | |
| @color = args[:color] | |
| @wheels = @@WHEELS | |
| end | |
| def drive | |
| @status = :driving | |
| end | |
| def brake |
| def rpn_calculator (string) | |
| return 'Not valid input' if string.class != String | |
| return string.to_i if string.split(' ').length == 1 | |
| new_string = string.scan(/\d+\s{1}\d+\s{1}[^0-9]/) | |
| eval_arr = new_string[0].to_s.split(' ') | |
| result = 0 | |
| if eval_arr[2] == '+' | |
| result = eval_arr[0].to_i + eval_arr[1].to_i |
| def longest_collatz_string(end_range) | |
| longest_chain = Array.new | |
| temp_array = Array.new | |
| ((end_range/2)..end_range).each do |number| | |
| temp_array = [] | |
| temp_array << number | |
| until temp_array.last == 1 | |
| temp_array.last.even? ? temp_array << temp_array.last / 2 : temp_array << temp_array.last * 3 + 1 | |
| end | |
| longest_chain = temp_array if temp_array.length > longest_chain.length |
| a = ["bananas", [1,2,3], ["apple", "cheese", [100, 20]], [true], [4.0, 7, 32]] | |
| def flatten(array) | |
| return array unless array.is_a?(Array) | |
| new_array = Array.new | |
| array.each do |item| | |
| new_array << item | |
| end | |
| flatten(new_array) | |
| end |
| a = ["bananas", [1,2,3], ["apple", "cheese", [100, 20]], [true], [4.0, 7, 32]] | |
| def flatten(array) | |
| nested_array_counter = 0 | |
| array.each { |item| nested_array_counter += 1 if item.kind_of?(Array)} | |
| return array if nested_array_counter == 0 | |
| new_array = Array.new | |
| array.each do |item| | |
| if item.class == Array |
| def nth_divisors(desired_divisors) | |
| natural_number_value = 1 # 1, 3, 6, 10, 15, 21, 28, 36, 45, 55....these are the natural value numbers | |
| natural_number_increment = 2 # To create a natural number we must increment +1, +2, +3, +4, +5, +6, etc | |
| divisor = 1 # This will be used as the denominator to our natural number | |
| number_of_divisors = 0 # Serves as a counter to log how many times the divisor divides evenly into the natural number | |
| until number_of_divisors >= desired_divisors # Code should end when the number of divisors for the natural number has reached my desired number of divisors | |
| divisor = 1 | |
| number_of_divisors = 0 | |
| until divisor > natural_number_value # Should stop when denominator becomes greater than numerator | |
| number_of_divisors += 1 if natural_number_value % divisor == 0 |
| # Determine whether a string contains a Social Security number. | |
| def has_ssn?(string) | |
| /(\d{3}-\d{2}-\d{4})/.match(string) | |
| end | |
| # Return the Social Security number from a string. | |
| def grab_ssn(string) | |
| m = String.new | |
| m = nil | |
| if /(\d{3}-\d{2}-\d{4})/.match(string) |