dskecse

require 'benchmark/ips'

ARRAY = (1..10).to_a

Benchmark.ips do |x|
  x.report('each') { sum = 0; ARRAY.each { |n| sum += n }; sum }
  x.report('reduce') { ARRAY.reduce(0, :+) }
end

Calculating -------------------------------------

dskecse

def honorific(klass):
    class HonorificClass(klass):
        def full_name(self):
            return 'Dr. ' + super(HonorificClass, self).full_name()
    return HonorificClass

@honorific
class Person(object):
    def __init__(self, first, last):
        self.first = first

dskecse

require 'English'

module NoDoubleRaisable
  def error_handled!
    $ERROR_INFO = nil
  end
  
  def raise(*args)
    if $ERROR_INFO && args.first != $ERROR_INFO
      warn "Double raise at #{caller.first}, aborting."

dskecse

function extend(destination, source) {
    for (var meth in source) {
        if (source.hasOwnProperty(meth)) {
            destination[meth] = source[meth];
        }
    }
    return destination;
}

dskecse

function list() {
    return [].slice.call(arguments, 0);
}

var list = list(1, 2, 3);    // [1, 2, 3]

dskecse

import React from "react"
import { render } from "react-dom"

const mountNode = document.createElement("div")
mountNode.id = "container"

document.body.appendChild(mountNode)

const name = "David"

dskecse

class User {
    // ...

    handleChange = e => {
    }
}

dskecse

diff --git a/src/components/Article.js b/src/components/Article.js
new file mode 100644
index 0000000..fef5d8a
--- /dev/null
+++ b/src/components/Article.js
@@ -0,0 +1,55 @@
+import React, { PropTypes, Component } from 'react'
+
+// stateful component (w/ state)
+class Article extends Component {

dskecse

beforeAll(() => {
    console.error = error => (
        throw new Error(error);
    );
});

dskecse

import { Component } from "React";

export const Enhance = ComposedComponent => class extends Component {
  constructor() {
    super()
    this.state = { data: null };
  }
  componentDidMount() {
    this.setState({ data: 'Hello' });
  }