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) {}

danott

/* modernizr-test.js
 * Daniel Ott
 * 3 March 2011
 * Custom Tests using Modernizr's addTest API
 */

/* iOS
 * There may be times when we need a quick way to reference whether iOS is in play or not.
 * While a primative means, will be helpful for that.
 */

eliperelman

            DO WHAT YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Eli Perelman <http://eliperelman.com>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT YOU WANT TO PUBLIC LICENSE

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

bjankord

/* ----------------------------------------------- 
 * Accurate Cross-Browser Viewport Width
 * https://gist.github.com/2399828
 * -----------------------------------------------
 * Copyright 2012, Brett Jankord.
 * http://www.brettjankord.com/
 *
 * Licensed under the MIT license:
 * http://www.opensource.org/licenses/MIT 
 * ------------------------------------------------*/

liamcurry

Moving from jQuery

Events

// jQuery
$(document).ready(function() {
  // code
})

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

jhclark

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
Send 1K bytes over 1 Gbps network        10,000 ns    0.01 ms
Read 1 MB sequentially from memory      250,000 ns    0.25 ms
Round trip within same datacenter       500,000 ns    0.5  ms
Read 1 MB sequentially from SSD       1,000,000 ns    1    ms  4X memory

jareware

⇐ back to the gist-blog at jrw.fi

Advanced SCSS

Or, 16 cool things you may not have known your stylesheets could do. I'd rather have kept it to a nice round number like 10, but they just kept coming. Sorry.

I've been using SCSS/SASS for most of my styling work since 2009, and I'm a huge fan of Compass (by the great @chriseppstein). It really helped many of us through the darkest cross-browser crap. Even though browsers are increasingly playing nice with CSS, another problem has become very topical: managing the complexity in stylesheets as our in-browser apps get larger and larger. SCSS is an indispensable tool for dealing with this.

This isn't an introduction to the language by a long shot; many things probably won't make sense unless you have some SCSS under your belt already. That said, if you're not yet comfy with the basics, check out the aweso

james2doyle

// easing functions http://goo.gl/5HLl8
Math.easeInOutQuad = function (t, b, c, d) {
  t /= d/2;
  if (t < 1) {
    return c/2*t*t + b
  }
  t--;
  return -c/2 * (t*(t-2) - 1) + b;
};