padolsey

// ----------------------------------------------------------
// A short snippet for detecting versions of IE in JavaScript
// without resorting to user-agent sniffing
// ----------------------------------------------------------
// If you're not in IE (or IE version is less than 5) then:
//     ie === undefined
// If you're in IE (>=5) then you can determine which version:
//     ie === 7; // IE7
// Thus, to detect IE:
//     if (ie) {}

jameshartig

function getIP(req) {
    var ip_address = (req.connection.remoteAddress ? req.connection.remoteAddress : req.remoteAddress);
    //check for cloudflare
    try {
        if (req.headers['cf-connecting-ip']) {
            var ipParts = ip_address.split(".");
            var cloudFlare = false;
            switch (parseInt(ipParts[0])) {
                case 204:
                    //(204.93.177.0 - 204.93.177.255)

cdata

wget https://raw.github.com/cdata/setup/master/setup.sh && chmod +x ./setup.sh && ./setup.sh

joelambert

Drop in replace functions for setTimeout() & setInterval() that 
make use of requestAnimationFrame() for performance where available
http://www.joelambert.co.uk

Copyright 2011, Joe Lambert.
Free to use under the MIT license.
http://www.opensource.org/licenses/mit-license.php

cdata

<!-- CloudFlareJS live deployment snippet -->
<script type="text/javascript">
//<![CDATA[
/* Options reference
 * 
 * verbose      boolean     Toggles verbose logging.
 * p            int         Timestamp prior to which cached content is invalid.
 * byc          boolean     Set to true to bypass local storage caching.
 * bag          string      The path prefix for the bag endpoint.
 * owl          string      The path prefix for the owl endpoint. Set falsey to disable.

Gozala

// Lack of tail call optimization in JS
var sum = function(x, y) {
  return y > 0 ? sum(x + 1, y - 1) :
         y < 0 ? sum(x - 1, y + 1) :
         x
}

sum(20, 100000) // => RangeError: Maximum call stack size exceeded

// Using workaround

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

zziuni

# source : http://code.google.com/p/natvpn/source/browse/trunk/stun_server_list
# A list of available STUN server.

stun.l.google.com:19302
stun1.l.google.com:19302
stun2.l.google.com:19302
stun3.l.google.com:19302
stun4.l.google.com:19302
stun01.sipphone.com
stun.ekiga.net

jashkenas

# MAC manipulators
alias random_mac='sudo ifconfig en0 ether `openssl rand -hex 6 | sed "s/\(..\)/\1:/g; s/.$//"`'
alias restore_mac='sudo ifconfig en0 ether YOUR_ORIGINAL_MAC_ADDRESS_GOES_HERE'

rimunroe

/yQA
/player
/universe
/debug
/toggleperf
/togglelogmap
/boxes
/clearboxes
/togglelayer
/fullbright