peter

'use strict';

var R = require('ramda');

var blank = function(value) {
  return value == null || (typeof value === 'string' && value.trim().length === 0);
};

var present = function(value) {
  return !blank(value);

peter

// BEFORE REFACTORING (IMPERATIVE)
var filteredLinks = [];
var weekdayCounts = {};
// Limit to 4 links per weekday.
// Loop through all links and keep track of
// how many are in each weekday.
widget.links.forEach(function(link) {
  var weekday = link.group;
  if (weekdayCounts[weekday] === undefined) {
    weekdayCounts[weekday] = 0;

peter

// 1. Swith two variables

// ES5
var temp = a;
a = b;
b = temp;

// ES6 - destructuring assignment
[b, a] = [a, b];

peter

Programming Languages

Lisp (1958)

Interpreted, dynamic typing, functional

C (1972)

Compiled, static typing, imperative (procedural)

peter

# Simple wrapper to allow hashes to be accessed via dot notation recursively.
# Recurses over hashes and arrays. Works with string keys
# and symbol keys - other types of keys are not supported and
# all keys must be of the same type. Write access is only supported via
# []= Hash syntax. Supports accessing hash values with square bracket Hash syntax ([...])
# and access is indifferent to if the key is given as a string or a symbol.
# Supports JSON generation.
#
# Dependencies: Ruby.
#

peter

# Running a single minimalistic unit test with Rails 4 and Ruby 2.1.1 is a lot faster
# if you avoid loading Rails:

# Running the test *with* Rails

time ruby -Itest test/models/my_model_test.rb # => real ~ 6s

# Running the test *without* Rails

time ruby -Itest/no_rails test/models/my_model_test.rb # => real ~ 0.6s

peter

# NOTE: There must be a better way to do this - help appreciated!

###############################################################
# uploaded_file.rb - utility class
###############################################################

class UploadedFile
  def self.size(file)
    uploaded?(file) ? file.size : nil
  end

peter

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Hooking up the middleware with the express app
// In app.js
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

var forceSSL = require('../middleware/ssl').force(config.hostname);
if ('production' == app.get('env')) {
  app.use(forceSSL);
}

peter

#################################################################
#
# File: lib/api.rb
#
#################################################################

require 'user' # ActiveRecord model

# Connect to the db
ActiveRecord::Base.establish_connection(ENV['DATABASE_URL'])

peter

# Poor man's identity map for reusing ActiveRecord objects and avoid fetching the same
# record multiple times from the database within a request or background job. The check method can
# be used to locate duplicate queries in development. The goal is to instantiate
# each ActiveRecord object only once. The Rails identity map is known to have issues:
# http://stackoverflow.com/questions/6905891/rails-3-1-identity-map-issues
class IdentityMap
  # Set one or more ActiveRecord objects in the map
  def set(*objects)
    objects.each do |object|
      map[key(object)] = object