DiegoSalazar

// Takes a credit card string value and returns true on valid number
function valid_credit_card(value) {
  // Accept only digits, dashes or spaces
	if (/[^0-9-\s]+/.test(value)) return false;

	// The Luhn Algorithm. It's so pretty.
	let nCheck = 0, bEven = false;
	value = value.replace(/\D/g, "");

	for (var n = value.length - 1; n >= 0; n--) {

neuro-sys

#include <stdio.h>
#include <windows.h>
#include <commctrl.h>
#include <math.h>

#include "ufmod.h"

unsigned char xm[5308] = {
     0x45,0x78,0x74,0x65,0x6E,0x64,0x65,0x64,0x20,0x4D,0x6F,0x64,0x75,0x6C,0x65,0x3A,
     0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

cuckookernel

A quick and dirty syntax translation / conversion reference guide to ease the transition between Python and Julia. This is not meant as a reference to the language. For that you should read the manual.

Some important differences

• Arrays in Julia are indexed starting from 1.
• In Julia classes (i.e. types) don't own methods. Methods are implementations of generic functions and are invoked in a "static style", i.e. instead of Python's str1.rstrip(), we will have rstrip( str1 ), instead of file1.close(), close( file1 ).

Some important similarities.

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

evancz

Architecture in Elm

This document is a collection of concepts and strategies to make large Elm projects modular and extensible.

We will start by thinking about the structure of signals in our program. Broadly speaking, your application state should live in one big foldp. You will probably merge a bunch of input signals into a single stream of updates. This sounds a bit crazy at first, but it is in the same ballpark as Om or Facebook's Flux. There are a couple major benefits to having a centralized home for your application state:

1. There is a single source of truth. Traditional approaches force you to write a decent amount of custom and error prone code to synchronize state between many different stateful components. (The state of this widget needs to be synced with the application state, which needs to be synced with some other widget, etc.) By placing all of your state in one location, you eliminate an entire class of bugs in which two components get into inconsistent states. We also think yo

region23

На русском языке

• Введение в программирование на Go - http://golang-book.ru/
• Всё, что вы хотели знать про GOPATH и GOROOT - http://habrahabr.ru/post/249545/ (статья на Хабре)
• Русский форум по Go - https://groups.google.com/forum/#!forum/golang-ru

Русскоязычные сайты и сообщества

• Первый русскоязычный сайт по Go http://4gophers.com/
• Русскоязычный slack-чат по Go https://golang-ru.slack.com

English resources

nullst

Как подавать заявки в вузы США

Процесс подачи заявок проходит примерно так:

• Сначала надо предварительно выбрать вузы, в которые вы будете подавать заявку.
• В августе-сентябре надо зарегистрироваться на три стандартных экзамена и оплатить их ($255 + $150 + $195). Отправка результатов в четыре вуза бесплатно, но их надо будет выбирать между регистрацией и днем экзамена.
• Где-то к концу октября их всех нужно уже сдать. Потом можно за дополнительные деньги рассылать результаты в другие вузы.
• Где-нибудь в середине ноября попросить трех людей написать вам рекомендации.
• В начале декабря заняться заполнением анкет в вузах.
• Написать Statement of Purpose.

yoavniran

The Ultimate Unit Testing Cheat-sheet

---

• Sinon Chai
• Chai
• Sinon

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

OlegIlyenko

In this gist I would like to describe an idea for GraphQL subscriptions. It was inspired by conversations about subscriptions in the GraphQL slack channel and different GH issues, like #89 and #411.

Conceptual Model

At the moment GraphQL allows 2 types of queries:

• query
• mutation

Reference implementation also adds the third type: subscription. It does not have any semantics yet, so here I would like to propose one possible semantics interpretation and the reasoning behind it.