Detronizator.org

Redirect 301 / http://blog.ivandemarino.me/

Detro — Fri, 03 Sep 2010 00:04:45 +0000

Lame metaphor Yes, this Blog is being migrated to http://blog.ivandemarino.me. Here is an heads-up. Now days I’m changing Hosting, DNS Registar, blog technology… and much more. Stay tuned at http://blog.ivandemarino.me for more updates. I have some news for you guys PS This also implies that some disruption could happen. Bare with us.

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Dan Pink on Motivation

Detro — Sun, 30 May 2010 19:13:51 +0000

This is a really amazing version of the Daniel H. Pink speech about Motivation. It all into it’s second book, “Drive: The Surprising Truth About What Motivates Us“. And, best of all, it’s all explained on a white board

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Books that are my Developer Mantra

Detro — Mon, 03 May 2010 21:24:57 +0000

I can’t put it any simpler: buy and read those 2 books ASAP. Getting Real Rework This is proper stuff. This is stuff that translates into words what you, THE DEVELOPER, would like to have in your daily work life. And probably the reason for which having a pet project, something where you set the rules, helps remaining sane,

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Job’s (a bit) wrong

Detro — Sun, 02 May 2010 11:30:14 +0000

This is a set of commets to some of the asserts made by Steve Jobs in his Thoughts on Flash. Safari has just ~5.5% of web users share [...] Apple even creates open standards for the web. For example, Apple began with a small open source project and created WebKit, a complete open-source HTML5 rendering engine that

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Links for 2010-04-16 [del.icio.us]

Sat, 17 Apr 2010 00:00:00 PDT

Home | JayCut

Roald Dahl Plass in 360º

Detro — Mon, 12 Apr 2010 23:42:13 +0000

This took some patience. Not to take the pictures themselves, but to bear with a group of trip-mates that were either freezing or bored to wait for me to take this 12 pictures -_- Roald Dahl Plass Do you like it? If so, I have a larger (way larger) version.

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The Story of Bottled Water

Detro — Tue, 30 Mar 2010 08:09:43 +0000

Show this to as much peoples as possible. It probably something some informed/smart people already know, but I admit that having someone making a video of it, makes it more “rememberable”, so more effective on (my) future behaviour. I’m cheese? I’m controllable through videos? Possibly, but in this case I’m OK with that. More at: The Story

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3 o’clock javascript

Detro — Sun, 28 Mar 2010 02:17:02 +0000

I was writing some code to react at a textarea.onKeyUp. I take the size of the current textarea.val().length, update an element and do some other stuff. yawn The first version of the code looked like: $('#message').keyup(function(e){ $('#chars_num').html( new_len ); $('#sms_num').html( Math.floor($('#message').val().length / 161) +1)...

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Links for 2010-03-15 [del.icio.us]

Tue, 16 Mar 2010 00:00:00 PDT

Andrew Hoyer | Experiments

Why iPhone still ruleZ

Detro — Wed, 17 Feb 2010 00:37:39 +0000

I’m going to make a simple point. And because people that know me think I’m a “unfair-Google-aficionado-that-doesn’t-see-how-evil-Google-is”, I’m going to use Android as victim here. iPhone ruleZ Other OS? I’m not even taking into consideration old stuff like Symbian: is just too easy to trash it now-days (Qt is a whole different story...

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Binary Tree Rebuilder

Detro — Fri, 05 Feb 2010 20:54:01 +0000

Imagine you have a Binary Tree, with those characteristics: Nodes do not respect any order relation – In other words: it’s not a Binary Search Tree of any kind Every node appears once and only once within the tree A nice Binary Tree Then, your little brother passes by your desk and, to upset you, deletes the tree from

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Serverless chat to reduce office distance

Detro — Sun, 31 Jan 2010 18:37:26 +0000

This idea comes out for an old university-time idea: to write a serverless chat application. Of course, I’m aware of the complications and the problems that using Broadcasting could create, so this problems would be took in consideration by design. But why now? I was thinking of a way to reduce the “office distances”: making easy

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iPad Simulator in Video and Comments

Detro — Sat, 30 Jan 2010 10:52:45 +0000

I would have just posted it on Twitter, but I have some comments about this video. One of the first video of the iPad Simulator Watch it in Full screen at 720p: it help “feeling” the proportions used by Apple in the UI It clarify how it does execute iPhone apps: they most probably implement the iPhone API

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Prime Numbers Generator

Detro — Sat, 23 Jan 2010 13:34:33 +0000

I believe I don’t have to describe what primes are, what are their properties and what not. This post is more a tribute to geek-ness of 2 friends-and-colleagues (@lucabox) that have fun thinking of algorithms to solve stupid (or less stupid), and always useless problems . Optimus Prime – yeah yeah, a

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“Bidirectionally multiplied” array

Detro — Fri, 22 Jan 2010 01:26:28 +0000

Another small problem before I go to sleep tonight: There is an array A[N] of N numbers. You have to compose an array Output[N] such that Output[i] will be equal to multiplication of all the elements of A[N] except A[i]. For example Output[0] will be multiplication of A[1] to A[N-1] and Output[1] will be multiplication of A[0] and from A[2]

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Use Backtracking to print all Subsets

Detro — Fri, 22 Jan 2010 00:47:31 +0000

I’m “studying” this algorithmic technique: Backtracking. This is an algorithmic approach to problem solution that I trust every good Computer Scientist already uses; but taking a good theo-practical look at it is something better. A Backtracking Tree I believe you can find enough informations about it online (the 2 links I provided are more than enough), so

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Links for 2010-01-19 [del.icio.us]

Wed, 20 Jan 2010 00:00:00 PST

Closure Compiler - Google Code

Money change problem: Greedy vs. Dyn.Pro.

Detro — Sun, 17 Jan 2010 21:37:56 +0000

This is a classical problem of Computer Science: it’s used to study both Greedy and Dynamic Programming algorithmic techniques. I hate having my pocket full of copper!!! -_- Definition Given: A set of n Denominations D[0...n-1] in ascending order, representing a Monetary Coin System An money amount A, as input calculate a solution: S[0...n-1], with 0 <= S[i] <= (A/S[i]) and 0

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Calculate abs(int) without branching

Detro — Wed, 13 Jan 2010 23:43:12 +0000

For this you need someone to teach it to you: if you made it yourself, then you are a very good Comp-Sci, and you should send your CV to Google ASAP. Without branching O_o? Yes, without using any “if ( a < 0 )...". To do that, you need to refresh how Two's Complement works,

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Swap the value of two integers without temporary storage

Detro — Wed, 13 Jan 2010 21:48:29 +0000

Someone says this is an old lame trick. I think it’s simple and clever use of XOR. How/Why does it work? It’s built around the properties of the XOR ^ operator, who has the following properties: A ^ B = B ^ A (commutative) A ^ 0 = A A ^ 1 = ~A A ^ A = 0 So, you can

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Pascal’s Triangle generator

Detro — Mon, 11 Jan 2010 01:31:09 +0000

What’s Pascal’s Triangle? That’s what it is (Wikipedia has all the theory, if you need). Pascal’s Triangle first 6 rows The thing I wrote here is a generator of the n-th row of the triangle, that doesn’t use more then the memory needed to store the solution. Instead of allocating a Triangular Matrix, and building every row

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String search in O(n + m)

Detro — Fri, 08 Jan 2010 16:39:21 +0000

Searching a string inside another string is a very easy task. Given a string A and a string B, start a loop over A from left to right and, for every letter, start an internal loop to see if there is a match with the letters of B. A ball of string Pseudo code would look something

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Count bits set in parallel

Detro — Thu, 07 Jan 2010 13:33:46 +0000

This time it’s not something I make myself. Indeed, I still can’t “see” it 100%: I got it, but it’s a bit complex. A cute little lady counting (bits? ) It’s a method to count the number of bits in a number in O(1), in just 5 lines of code. INHUMAN. The “human” solutions Of course, there

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Largest square array of same integers

Detro — Thu, 07 Jan 2010 01:26:12 +0000

Tonight it’s a challenging one. Or, better, a problem of which is really difficult to find a good solution in < O(n3). Indeed, it’s a question that an ex-colleague was asked during an interview with Big-G. The guy, a part from being a REALLY smart guy, is also very humble, and he doesn’t want to be

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The “Polite” Merge Sort

Detro — Wed, 06 Jan 2010 17:04:10 +0000

Another old-classic problem: the Merge Sort. Merge Sort Algorithm The problem of the classical implementation The whole algorithm is explained in the wikipedia link above, so I’ll focus on the problem here. The Merge Sort is an in-place-sorting-algorithm that requires some support memory to do it’s calculations. At the “merge step”, an amount of memory as large as the

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Fibonacci’s numbers calculator

Detro — Tue, 05 Jan 2010 00:39:40 +0000

Another simple-but-yet-interesting problem that I found challenging solving is the to Write a Fibonacci’s numbers calculator. It’s a REALLY SIMPLE problem, but still can demonstrate how superficial thinking in programming can lead to dramatically bad solutions. What’s a Fibonacci’s number A Fibonacci’s number is an integer number generated using the following...

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I want it!

Detro — Mon, 04 Jan 2010 10:33:37 +0000

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YouTube >> The Go Programming Language

Detro — Sat, 02 Jan 2010 22:13:12 +0000

A video that I need to watch myself (I just managed to watch 25% of it), but I thought was good to post it here: just to remind how good it is to think “out of the box”. Even in Programming Languages. Presenter: Rob Pike Presented on: 30th Oct 2009 Go is a new experimental systems programming language

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Find the non repeating char in O(n) time and O(1) space – v2

Detro — Fri, 18 Dec 2009 23:22:34 +0000

My colleague and friend Luca (@lucabox) described a better solution to the problem of “Finding the first non repearing char in a string in O(n) time and O(1) space“. It uses smartly the space, making the solution nicer and slicker. Or we are just 2 geeks that need to give more attention to their girlfriends

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Babbo Natale? O_o

Detro — Fri, 18 Dec 2009 18:31:49 +0000

Todays and yesterday search terms bringing people (very few of them) to my blog. Why “Babbo Natale”? In Italian, “Babbo Natale” means “Santa Claus”, btw. I’m fat, but not THAT fat!!! Today Yesterday Weird.

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Find the non repeating char in O(n) time and O(1) space

Detro — Sun, 13 Dec 2009 22:09:09 +0000

I would like to post some of the Brain Teaser (mostly algorithmic problems) I’m giving to interviewee lately, and of course some that were submitted to me in the past. But I can’t promise I will keep doing it regularly: just that I will try (blogging regularly is hard for me). The solution will be at the

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Links for 2009-11-16 [del.icio.us]

Tue, 17 Nov 2009 00:00:00 PST

Authentic Jobs ~ Full-time and freelance job opportunities for web, design, and creative professionals

Links for 2009-09-23 [del.icio.us]

Thu, 24 Sep 2009 00:00:00 PDT

Westcord Hotels - Tulip Inn Amsterdam Centre

AES explains itself

Detro — Wed, 23 Sep 2009 15:59:26 +0000

This guy, Jeff Moser, is mental! He made a loooong comic strip to make AES explain itself: from a very high level, non technical explanation, deep down to mathematical details. Worth a read for sure!

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Links for 2009-09-22 [del.icio.us]

Wed, 23 Sep 2009 00:00:00 PDT

CodiceFiscale Web Service

Links for 2009-09-07 [del.icio.us]

Tue, 08 Sep 2009 00:00:00 PDT

iPhone Programming Tutorial

Just added support for Tweetable

Detro — Fri, 14 Aug 2009 11:29:49 +0000

What’s Tweetable? It’s a plugin that integrates Twitter into my blog.

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QDetroBro: Experimenting with Qt on S60

Detro — Thu, 13 Aug 2009 11:23:44 +0000

The best way to learn a new language or a new framework is to find an idea and implement it. So I’m doing for Qt on S60. So I decided to implement a dummy browser that has some smart/attractive/peculiar/interesting/funny bits. QDetroBro Because I’m lazy to package and attach code, and because is always good the evolution

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Git-over-SSH through Socks 5 Proxy on Windows

Detro — Thu, 13 Aug 2009 10:01:52 +0000

Because of my work, I use crappy M$ Windows in my office. And we are behind a bidirectional firewall. So, how do you do if you need to pull/push code with Git-over-SSH in this scenario? You need a Socks 5 that passes the firewall, and some scripting. First, you need to install: Git on Windows – http://code.google.com/p/msysgit/ Connect.c –

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Snippet: fix Screen Orientation in a Qt/S60 app

Detro — Tue, 11 Aug 2009 08:58:10 +0000

I follow the Qt/S60 Mailing list, that is turning out to be a very interesting and active ML, and the Qt Labs blog, always full of very good code, written directly by the guys of Qt Software. I thought could be nice to start to post some of the stuff I’m learning. #include <eikenv .h> #include <eikappui

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Censured Berlusconi’s pictures published by the El-Pais

Detro — Sun, 05 Jul 2009 18:03:50 +0000

The video is in Spanish with Italian subtitles, I’m sorry. You can find more content here. What happened in Italy is pure censorship to protect the image of a depraved, sick old man that rules my country in a new “media-dictatorship” way. The Italians should know about this. Source: blog.neminis.org.

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What in the hell is txty.mobi?

Detro — Sat, 04 Jul 2009 22:51:09 +0000

http://www.txty.mobi/ – For sure is related to mobile, usability, simplicity and “making you able to use what you paid for“. Intrigued?

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M$ pukes on itself because of IE8

Detro — Sat, 04 Jul 2009 08:24:03 +0000

I mean, you could puke because of IE8 for sure, but to make an ad to support the idea… > I’m not really sure that this ad is from M$ but, what the hell, it’s disgustingly funny!

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Italy: a scandal-proof Country

Detro — Tue, 30 Jun 2009 13:06:20 +0000

I feel ashamed. The Guardian a week ago released this article explaining, in a “reasonably informed way” why “nothing happens after all the scandals in which the Psycho-Nano is involved”. I say “reasonably informed way” because, normally, newspapers that are not Italian don’t really get what the man is: to understand Berlusconi you need to understand

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HTC Hero in UK from Orange

Detro — Wed, 24 Jun 2009 20:30:07 +0000

I’m with a bit of proudness that I say that in July the HTC Hero, a new Android-based smart-phone, is going to be launched. HTC Hero – First Look For UK, Orange will be the operator to sell it. As far as I know, details are not being disclosed yet. HTC has developed this new UI/UX (User Interface/User

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Linus Torvalds’s DNA is in Binary

Detro — Tue, 16 Jun 2009 21:36:56 +0000

While Twitter is down (O_o), I decided to put this here: Linus Torvalds Facts. LOL!

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Enable Tethering on iPhone 3.0

Detro — Mon, 15 Jun 2009 18:46:59 +0000

I found this page that sends you via email the right “Profile” for iPhone 3.0 to enable tethering. No Jailbrake or Unlocking required: it just works. After you install the profile, enable Tethering and follow the instructions on the phone. If you decide to use Bluetooth, after you pair the device with your laptop, just configure it as

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