ac-graphic.net

Full-height Layouts

ancailliau — Thu, 13 Oct 2011 07:39:32 +0000

Steve Sanderson continues his series on full-height layouts. Main focus is on phone and tablet UX.

Dartboard Seems Not to Implement Tail Recursion

ancailliau — Wed, 12 Oct 2011 15:24:20 +0000

I started experimenting with Dart. Obviously, one of the first question is: Does it implements tail recursion?

int recursive(int n) {
if (n <= 0) return 0;
return recursive(n-1) + 1;
}

int tailRecursive (int n, int acc) {
if (n <= 1) return 0;
return tailRecursive (n-1, acc+1);
}

main() {
int max = 1000000;
double totalTime = 0.0;
for (int i = 0; i < max; i++) {
var start = Clock.now();
recursive(100);
var end = Clock.now();
totalTime += (end - start);
}
totalTime /= max;
print ('${(totalTime/Clock.frequency()) * 1000} ms');

totalTime = 0.0;
for (int i = 0; i < max; i++) {
var start = Clock.now();
tailRecursive (100,0);
var end = Clock.now();
totalTime += (end - start);
}
totalTime /= max;
print ('${(totalTime/Clock.frequency()) * 1000} ms');
}

Well… It seems not.

0.004474 ms
0.004762 ms

My previous post didn’t compare comparable algorithms. Because time complexity was not the same. Sorry for the confusion. First algorithm ran in O(1.618^n) and the other in O(n). Therefore, not comparable in any way! 5 minutes experiments before leaving the office are always bad…

Invoking an Action with Enter Key and KnockoutJS

ancailliau — Wed, 12 Oct 2011 09:56:50 +0000

Easy, near from trivial, but really useful. This shall improve the speed and convenience for most users.

I like how source code is clean.

KnockoutJS Custom Binding for Invoking an Action with Enter Key.

Dart, a new language from Google

ancailliau — Tue, 11 Oct 2011 08:03:32 +0000

I didn’t had the time (yet) to dive into dart. There is a (unreadable?) specification of the language here that should allow abstract interpretation to detect common errors or issue warnings.

A project to watch, for sure. Especially the VM that will be integrated in Chrome.

Meaningful Play. Getting Gamification Right

ancailliau — Mon, 10 Oct 2011 19:32:03 +0000

An other presentation about gamification. Much more weighted than the previous one, comments in the slide are worth reading.

Meaningful Play. Getting »Gamification« Right.

View more presentations from Sebastian Deterding

Resque and the queueing system

ancailliau — Mon, 10 Oct 2011 18:20:36 +0000

An interesting (but old) post illustrating how GitHub moved from one system to an other. The mentioned systems are responsible for queueing and dequeueing jobs for background tasks.

Introducing Resque

Goal-Oriented Requirements Engineering: A Guided Tour

ancailliau — Fri, 07 Oct 2011 18:28:06 +0000

Selected for the most influential paper award at RE2011, this paper draw a large picture of goal-orientation in requirement engineering. It clearly states the context and the advantages of the approach. If you’re interested in a brief and not-so-technical introduction to the field I’m researching in, you shall read this paper.

Read the paper

Gamification in Software Systems

ancailliau — Fri, 07 Oct 2011 12:42:12 +0000

This presentation quickly overview the underlying concepts attached to gamification. A clear, simple and applicable presentation. I especially appreciate the “white” slides with checklist and proposed steps to introduce game in a system.

Gamification Workshop 2010

View more presentations from Amy Kim

Kevin Slavin: How Algorithms Shape Our World

ancailliau — Fri, 07 Oct 2011 08:12:59 +0000

This is an inspiring video about algorithms and their use in the finance. A must-see video.

Building Software Systems At Google and Lessons Learned

ancailliau — Fri, 07 Oct 2011 08:11:05 +0000

An interesting and accessible video about software system. I especially enjoyed the last slides about software patterns.