Blog http://jrgns.net//?q=tag/1 Random thoughts, solutions to niggling programming problems, what ever is on my mind! en-us Mon, 21 May 2012 06:06:07 +0200 Mon, 21 May 2012 06:06:07 +0200 http://blogs.law.harvard.edu/tech/rss Backend-PHP jrgns@jrgns.net jrgns@jrgns.net Decorator Pattern Implemented Properly In PHP http://jrgns.net/contents/36 While working on Backend-PHP I needed to do a proper implementation of the Decorator Pattern in PHP. Just googling PHP decorator pattern will come up with a number of simple solutions, but none of them are usable in a general, robust way that a framework requires. So I extended and tweaked the implementations a bit.… ]]> Sat, 17 Mar 2012 11:14:56 +0200 http://jrgns.net/contents/36 The Low Hanging Fruit Of Testing http://jrgns.net/contents/35 I've been getting more into Testing (specifically Unit Testing) the past few weeks, and although I'm still struggling to firstly get it right, and secondly see the long term benefits, I know that the quality of my code is already better. Let's call it the low hanging fruit of Testing.

… ]]> Fri, 16 Mar 2012 15:14:03 +0200 http://jrgns.net/contents/35 json-encode'ing Private and Protected Properties http://jrgns.net/contents/34 When you json_encode an object, it will ignore all protected and private properties if the json_encode isn't called from within the object. Sometimes you want to output the protected and private properties of an object when you're JSON encoding it. Here's how to do it in an easy and elegant way:… ]]> Fri, 24 Feb 2012 06:51:15 +0200 http://jrgns.net/contents/34 22seven.com - Folly, or Genius? http://jrgns.net/contents/33 Promising Product

Last week Christo Davel, founder of the now defunct twenty20 bank, released an online personal accounting service called 22seven.com. It looked like a great product. Something I was looking for for quite a while: A simple online interface that automatically imports my transaction details, and reports on how much I'm spending on what.

I will never use it, though. Why? The app asks for your online banking login details.… ]]> Sat, 28 Jan 2012 08:37:06 +0200 http://jrgns.net/contents/33 Setting up Puppet on Ubuntu 10.4 http://jrgns.net/contents/32 I'm trying to use puppet to setup standard dev and (eventually) production environments. As Ubuntu 10.4 is the current LTS release (at least until 12.4), I need to get puppet running on 10.4. The problem is that although the latest stable release for puppet is 2.7.6, puppet in the ubuntu repo is version 0.25.4. Here's how to firstly set it up, and then upgrade it to the latest version.

… ]]> Wed, 16 Nov 2011 04:24:06 +0200 http://jrgns.net/contents/32 Backend-Core: A RESTful MVC PHP Framework http://jrgns.net/contents/31 I like frameworks. I like working with them, I like writing them. I wrote Backend-PHP, which I'm using personally and at Branded Internet. Unfortunately it has a number of major flaws: It's not easily unit testable, not really a REST web service, and it doesn't conform to any popular coding standards. So I wrote Backend-Core as the first step towards addressing these issues.… ]]> Fri, 14 Oct 2011 06:59:32 +0200 http://jrgns.net/contents/31 Why Johnny Died (or, How I Finally Realised Why Singletons And Global Variables Are Bad) http://jrgns.net/contents/29 Johnny (an asthma sufferer and fictitious character) died yesterday. He got an asthma attack, but he could not find his inhaler, and sadly passed away. Usually his mother kept it for him and made sure he used it, but on the first day he ventured out alone, he got an asthma attack, realised that he didn't have his inhaler with him, and died. What does this have to do with Singletons or Global variables? Read on...… ]]> Wed, 28 Sep 2011 04:06:19 +0200 http://jrgns.net/contents/29 A PHP Virtual Host http://jrgns.net/contents/27 I hate repetitive work. I love solving a puzzle. So it often happens that I'd spend 2 hours writing a script to solve a repetitive problem, than just taking the 2 minutes to do it manually. Creating apache config files are tedious and boring, so I wrote a PHP script that emulates Virtual Hosting.… ]]> Tue, 13 Sep 2011 03:18:03 +0200 http://jrgns.net/contents/27 A JavaScript trim function http://jrgns.net/contents/25 A simple enough trim function for JavaScript:

function trim(string) {
    return string.replace(/^\s*|\s*$/g, '')
}
… ]]> Mon, 18 Jul 2011 04:55:32 +0200 http://jrgns.net/contents/25 Quick Guide To Creating A Website Quickly http://jrgns.net/contents/24 The last two weeks I had the privilege of staying in a house on the beach near Mosselbay. This time of the year whales start coming into the bay, and, if you're lucky, you can spot them breaching or displaying their flukes or fins. This inspired me to create WhaleSpotter, a site that uses Twitter to help people spot whales along South Africa's south coast. It took me less than 2 hours to do it. Here's how.… ]]> Mon, 11 Jul 2011 21:31:53 +0200 http://jrgns.net/contents/24