Kranthi Lakum kranthilakum

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This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

How to make faster scroll effects?

Avoid too many reflows (the browser to recalculate everything)
Use advanced CSS3 for graphic card rendering
Precalculate sizes and positions

Beware of reflows

The reflow appens as many times as there are frames per seconds. It recalculate all positions that change in order to diplay them. Basically, when you scroll you execute a function where you move things between two reflows. But there are functions that triggers reflows such as jQuery offset, scroll... So there are two things to take care about when you dynamically change objects in javascript to avoid too many reflows:

Snow in canvas land

Other people's code is awful, and your own code from months previous counts as someone else's. With this and the festive spirit in mind, I dug up a canvas snow demo I made two years ago to see how bad my code really was.

Turns out the performance landscape has changed quite a bit, but after applying a couple of workarounds, best practices, and memory management, I got the demo running smoother than it ever did.

Ugh, I can't believe I just wrote "performance landscape". Anyway...

How does the demo work?

SQL to MongoDB Mapping Chart

SQL to MongoDB Mapping Chart¶

In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB.

Executables¶

The following table presents the MySQL/Oracle executables and the corresponding MongoDB executables.

⇐ 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

Jitbit's SQL interview questions

http://www.jitbit.com/news/181-jitbits-sql-interview-questions/

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	% FontAwesome (http://fortawesome.github.com/Font-Awesome/) bindings for (Xe)LaTeX
	% Author: Honza Ustohal <[email protected]>
	%
	% Translation of FontAwesome's private range characters into XeTeX symbols. All icons are camel-cased and prefixed with 'fa', i.e. what was .icon-align-center the CSS version of FontAwesome becomes \faAlignCenter
	% This might be reworked into a full blown package in the near future
	%
	% Prerequisite:
	% XeLaTeX, FontAwesome installed as a system font accessible by XeLaTeX
	%
	% Usage:

	/**
	* Convert From/To Binary/Decimal/Hexadecimal in JavaScript
	* https://gist.github.com/faisalman
	*
	* Copyright 2012-2015, Faisalman <[email protected]>
	* Licensed under The MIT License
	* http://www.opensource.org/licenses/mit-license
	*/

	(function(){

	function Foo(who) {
	this.me = who;
	}

	Foo.prototype.identify = function() {
	return "I am " + this.me;
	};

	function Bar(who) {
	Foo.call(this,"Bar:" + who);