jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

erikreagan

Mac web developer apps

This gist's comment stream is a collection of webdev apps for OS X. Feel free to add links to apps you like, just make sure you add some context to what it does — either from the creator's website or your own thoughts.

— Erik

poom

class ArrayToXML
{
    /**
     * The main function for converting to an XML document.
     * Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.
     * Based on: http://snipplr.com/view/3491/convert-php-array-to-xml-or-simple-xml-object-if-you-wish/
	 * 
     * @param array $data
     * @param string $rootNodeName - what you want the root node to be - defaultsto data.
     * @param SimpleXMLElement $xml - should only be used recursively

6174

 //http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
 Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);

irazasyed

Learn more about Sharing Best Practices for better understanding.

V1: This version has properties but the output would be with numeric keys, Example (Google, Bing and Yahoo are the Hyperlinks/Clickable):

1: Google
2: Bing
3: Yahoo

nadar

<?php

/**
 * Send a Message to a Slack Channel.
 *
 * In order to get the API Token visit: 
 *
 * 1.) Create an APP -> https://api.slack.com/apps/
 * 2.) See menu entry "Install App"
 * 3.) Use the "Bot User OAuth Token"

jeffochoa

<?php

// This can be found in the Symfony\Component\HttpFoundation\Response class

const HTTP_CONTINUE = 100;
const HTTP_SWITCHING_PROTOCOLS = 101;
const HTTP_PROCESSING = 102;            // RFC2518
const HTTP_OK = 200;
const HTTP_CREATED = 201;
const HTTP_ACCEPTED = 202;

KaiCMueller

<?php

/**
 * array_merge_recursive does indeed merge arrays, but it converts values with duplicate
 * keys to arrays rather than overwriting the value in the first array with the duplicate
 * value in the second array, as array_merge does. I.e., with array_merge_recursive,
 * this happens (documented behavior):
 *
 * array_merge_recursive(array('key' => 'org value'), array('key' => 'new value'));
 *     => array('key' => array('org value', 'new value'));

simonw

How to upgrade a Heroku PostgreSQL database to a new plan

I started a project on a Hobby Dev plan (free, limit 10,000 rows), and then later needed to upgrade it to Hobby Basic ($9/month, limit 10,000,000 rows).

After assigning the new database, I had two databases attached to the application. They looked something like this:

• HEROKU_POSTGRESQL_OLIVE (postgresql-dimensional-3321) Old, free-tier (Hobby Dev) database

andersevenrud

OS.js v3 has been released

This is the "general" list of tasks for OS.js v3 development. I'm just adding things here as I go or things pop into mind. So if you see anything interesting and you want to pitch in, that'd be much appreciated.

See the following repositories for issues/todos that are not included here:

• Client: https://github.com/os-js/osjs-client
• Server: https://github.com/os-js/osjs-server
• User Interfaces: https://github.com/os-js/osjs-gui
• Dialog Interfaces: https://github.com/os-js/osjs-dialogs