reegnz

The Terraform group_by you've been missing

I'm playing around a lot nowadays with Terraform 0.13 and I found a really interesting feature and that's the ... symbol (also called an ellipsis) to be used with for expressions.

The operator can be used for group_by operations.

Example

We have a list of entries. The list contains employee/manager/project triplets.

yyx990803

// $ yarn add request request-promise
// $ node count userA userB

const request = require('request-promise')

const get = resource => request({
  url: /^https/.test(resource) ? resource : `https://api.github.com/${resource}`,
  headers: {
    'User-Agent': 'GitHub Contrib Counter',
    'Authorization': 'token YOUR_PERSONAL_ACCESS_TOKEN'

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.

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ShirtlessKirk

/**
 * Luhn algorithm in JavaScript: validate credit card number supplied as string of numbers
 * @author ShirtlessKirk. Copyright (c) 2012.
 * @license WTFPL (http://www.wtfpl.net/txt/copying)
 */
var luhnChk = (function (arr) {
    return function (ccNum) {
        var 
            len = ccNum.length,
            bit = 1,