johnloven

import { useRef, useEffect, useCallback } from "react";

// Rate limit a function but make sure the last call in a series of calls is run.
function useRateLimitedCallback(timeout, callback) {
    // Save the callback in a ref to allow using a un-memoized callback parameter without changing identity of the returned callback function
    const callbackRef = useRef(callback);
    useEffect(() => {
        callbackRef.current = callback;
    });

WintersMichael

Understanding Kubernetes in 10 minutes

This document provides a rapid-fire overview of Kubernetes concepts, vocabulary, and operations. The target audience is anyone who runs applications in a cloud environment today, and who wants to understand the basic mechanics of a Kubernetes cluster. The goal is that within 10 minutes, managers who read this should be able to listen in on a Kubernetes conversation and follow along at a high level, and engineers should be ready to deploy a sample app to a toy cluster of their own.

This orientation doc was written because the official Kubernetes docs are a great reference, but they present a small cliff to climb for newcomers.

If you want to understand why you should consider running Kubernetes, see the official Kubernetes conceptual overview document. This document is intended to complement that one, but one layer deeper.

For a deep dive, see [Kubernetes concepts](https://kubernetes.io/docs/co

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

kalmas

'use strict';

var cluster = require('cluster');
var bunyan = require('bunyan');

if(cluster.isMaster) {
  console.log('Master starting up! PID: ' + process.pid);

  // Fork 20 workers.
  for (var i = 0; i < 20; i = i + 1) {

pulkitsinghal

var loopback = require('loopback');

// HINT(s):
//   Getting the app object: http://docs.strongloop.com/display/public/LB/Working+with+LoopBack+objects
//   From a model script: http://docs.strongloop.com/display/public/LB/Working+with+LoopBack+objects#WorkingwithLoopBackobjects-Fromamodelscript
module.exports = function(StoreModel) {
  StoreModel.prototype.instanceRemoteMethodSignature = function(cb) {
    console.log('print this instance object: ', this);
    cb(null);
  };

mikeatlas

Array.prototype.splitAtEvery = (callback) ->
	sections = []
	arrayClone = this.slice(0)
	$.each(arrayClone, (idx, item) =>
		sectionsLength = 0
		_.each(sections, (section) => 
			sectionsLength += section.length;
		)
		if callback(this, idx, item) == true
			sections.push(arrayClone.slice(0, idx+1-sectionsLength))

gubatron

How to configure multiple deploy keys for different private github repositories on the same computer without using ssh-agent

Let's say alice is a github.com user, with 2 or more private repositories repoN. For this example we'll work with just two repositories named repo1 and repo2

https://github.com/alice/repo1

https://github.com/alice/repo2

You need to be to pull from these repositories without entering a passwords probably on a server, or on multiple servers.

Globegitter

# Automatically instal the latest nginx
wget -O - http://nginx.org/keys/nginx_signing.key | sudo apt-key add -

#Make a backup copy of your current sources.list file
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

#Now copy the following repositories to the end of ` /etc/apt/sources.list`
echo "deb http://nginx.org/packages/mainline/ubuntu/ trusty nginx" | sudo tee -a /etc/apt/sources.list
echo "deb-src http://nginx.org/packages/mainline/ubuntu/ trusty nginx" | sudo tee -a /etc/apt/sources.list

yoitsro

var restify = require('restify');

// Authentication
var passport        = require('passport');
var LocalStrategy   = require('passport-local').Strategy;
var sessions        = require("client-sessions");

var server = restify.createServer();
server.use(restify.queryParser());
server.use(restify.bodyParser());

pauloricardomg

#
# Acts as a nginx HTTPS proxy server
# enabling CORS only to domains matched by regex 
# /https?://.*\.mckinsey\.com(:[0-9]+)?)/
#
# Based on: 
# * http://blog.themillhousegroup.com/2013/05/nginx-as-cors-enabled-https-proxy.html
# * http://enable-cors.org/server_nginx.html
#
server {