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HP19B II Business Calculator

What with all the news about a possible recession due to an inverted yield curve (now, there’s a possible post, given my work for a Swaps trading group a while back), and given that someone commented on one of my old posts about a calculator in my collection, I thought it was about time to show off another one. This time we’re going to talk Business. […]

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My most recent sunk cost fallacy

So I have this mini PC in my office that I use for various personal apps and data, stuff I don’t want on my laptop in case that goes missing, gets confiscated or nicked, etc, when I travel. Ultra-cautious, moi? […]

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Hash tables – part one

Next in my occasional series of “reprints” from The Delphi Magazine is a series of articles about one of my favorite data structures, the hash table. […]

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Priority queue – part three

You might have thought that the last couple of posts would have done it for the priority queue – after all, we have the optimal heap implementation for it – but no. There are a couple more fun bits. Let’s investigate a little bit more. […]

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Priority queues – part two

Last time, we introduced the concept of a priority queue data structure, and illustrated it with a couple of simple implementations using an array: firstly by adding new items at the end, and then getting the highest priority item by searching through the array; secondly by maintaining the array in sorted order by priority, forcing new items to be inserted in the correct position in the array, and getting an item is merely removing it from the end of the array. I called these fast insertion/slow deletion and slow insertion/fast deletion implementations. […]

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Priority queues – part one

First up in my “reprints from The Delphi Magazine, cast in JavaScript” posts must be the priority queue. It is after all, an important data structure, can be implemented quickly (although perhaps in not a very efficient manner), and introduces an excellent algorithm, the heap. […]

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Articles for The Delphi Magazine

For some time now, I’ve been pondering whether or not to post my old articles from The Delphi Magazine here on my blog. I supplied Chris Frizelle, the editor, with algorithm articles for a good nine years from November 1997 (with an eight month hiatus while I worked at Microsoft: at the time they frowned upon that kind of thing, especially writing about Delphi and not C# – eek!), under the soubriquet Algorithms Alfresco. It would not be hard to discern that that the early ones formed the basis for my algorithms book. […]

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Revamped Boyet – redux

In less than a week, after almost ten years (!), the GoDaddy hosting plan I had for this site will expire. Transferring it and all its existing content to Microsoft Azure (and securing it along the way) has been a journey and a half, let me tell you, and over the past month or so – you may have noticed when stuff didn’t work – I’ve been finalizing all the tweaks I had to do. For future reference, here in no particular order were some of the last minute fine-tuning I had to do. […]

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Reviving my XPS 15z

So, recently I upgraded my main laptop to the latest-but-one XPS 13. All fine and dandy, but as I started to reinstall stuff, I noticed that my license for VMWare was a little (he says discreetly) out of date. And they wanted $149 to upgrade. Normally that’s fine, but it has to be said my use of virtual machines is getting a bit long in the tooth. […]

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Case-sensitive website on AWS

As part of my divestiture from GoDaddy hosting for boyet.com, I had to move my old static site as well as this blog. The static site moved to secondboyet.com (being the second wave of blogging I did for boyet) and the third current wave is still on boyet.com (but now resides on Microsoft Azure). Because that second wave served up static pages (there ain’t no blog engine there) and because Amazon’s AWS is dirt cheap in those circumstances (plus it can serve it up securely via HTTPS and SSL), that’s where I moved it. I added a bit of code to boyet.com’s web.config to redirect requests and all was good. […]

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