srbdev

const maybe = (fn) =>
  function (...args) {
    if (args.length === 0) {
      return
    }
    else {
      for (let arg of args) {
        if (arg == null) return;
      }
      return fn.apply(this, args)

srbdev

const once = (fn) => {
  let done = false;
  
  return function() {
    return done ? void 0 : ((done = true), fn.apply(this, arguments))
  }
}

srbdev

const barker = (state) => ({
  bark: () => console.log('Woof, I am ' + state.name)
})

const driver = (state) => ({
  drive: () => state.position = state.position + state.speed
})


const murderRobotDog = (name) => {

srbdev

// Better to use actual classes when dealing with LOTS (i.e. > 100,000) of objects

const dog = () => {
  const sound = 'woof'
  return {
    talk: () => console.log(sound)
  }
}

const sniffles = dog()

srbdev

require_relative 'some_file_name'

class Klass
    def initialize(arg)
        @arg = arg
    end
    
    def display
        puts 'Hello #{@arg}'
    end

srbdev

require 'capybara'

session = Capybara::Session.new(:selenium)
session.driver.class.class_eval { def quit; end  }

session.visit 'https://google.com'
session.fill_in 'lst-ib', :with => 'GameSparks'
session.find('#lst-ib').native.send_keys(:return)
session.find_link('GameSparks | The #1 Backend-as-a-Service platform for ...').click

srbdev

(function() {
    var s = document.createElement('script');
    s.type = 'text/javascript';
    s.async = true;
    // has to be https to work...
    s.src = '//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js';

    document.getElementsByTagName('body')[0].appendChild(s);
})();

srbdev

env X="() { :;} ; echo you might be vulnerable" /bin/bash -c "echo hello"

srbdev

$.fn.extensionName = function() {

  // code goes here...
  
  return this;

}

srbdev

// Makes out.pdf with page 1 of in.pdf
pdftk in.pdf cat 1 output out.pdf