Apple – iPad: la vera strategia

iPad

C’è stata molta eccitazione intorno alla presentazione dell’iPad da parte della Apple.

Il prodotto finale risulta una specie di “iPhone più grosso”, con funzionalità simili al Kindle di Amazon, che ovviamente consta circa 200 dollari di meno.

E allora dove sta la novità, la geniale lungimiranza di Steve Jobs?

In realtà l’iPad è un passo avanti nel tentativo di creare un ecosistema che faccia terra bruciata dei concorrenti, come già è successo per l’iPhone (“il solito cellulare touch…”ricordate?): vediamo perché.

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Emacs 23 is out!

“After only 2 years since the previous version, now emacs 23 .1 is available. It brings many new features, of which the support for anti-aliased fonts on X may be the most visible. Also, there is support for starting emacs in the background, so you can pop up new emacs windows in the blink of an eye. There are many other bigger and smaller improvements, including support for D-Bus, Xembed, and viewing PDFs inside emacs. And not to forget, M-x butterfly. You can get emacs 23 from ftp.gnu.org/gnu/emacs/ or one of its mirrors; alternatively, there are binary packages available, for example from Ubuntu PPA.”

via Slashdot: News for nerds, stuff that matters.

For the young readers, emacs is the oldest Open Source project out of there. And it has a lot to teach to the other integrated developement environments!

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Phing

PHing Is Not GNU make; it’s a project build system based on Apache Ant. You can do anything with it that you could do with a traditional build system like GNU make, and its use of simple XML build files and extensible PHP “task” classes make it an easy-to-use and highly flexible build framework. Features include file transformations (e.g. token replacement, XSLT transformation, Smarty template transformations), file system operations, interactive build support, SQL execution, CVS operations, tools for creating PEAR packages, and much more.

via Phing.

C– for cross compiler

In late 1994, when I need to write a programming language it was a pain. You must start with flex, lex and so on, and the way will be very long.

Then I found GCC was able to compile in a pseudo-machine language, already optimized. Then a set of backend was able to emit mc68000, 80×86, power pc code…

I am glad to see now there is a “stripped down” version of the C language to simplify this hard work….
By the way, Fortran has been the first compiled language, appeared near 1957.

“A new perspective on programming-language infrastructure”

Welcome to C–

Suppose you are writing a compiler; how will you get quality machine code? You might write your own code generator—but that’s a lot of work. You might use somebody else’s: perhaps VPO, MLRISC, or the gcc back end. But each of these impressive systems has a rich, complex, and ill-documented interface, and furthermore, to use MLRISC you must write your front end in ML, to use gcc you must write it in C, and so on. You might generate C, if you can live without multiple results in registers, proper tail calls, computed gotos, accurate garbage collection, and efficient exceptions.

You would be much happier with one portable assembly language that could be generated by a front end and implemented by any of several code generators. Such a language should serve as the interface between high-level compilers and retargetable, optimizing code generators. Authors of front ends and authors of code generators could cooperate easily. C– is that language.

What distinguishes C–

The following aspects of C– distinguish it from other compiler infrastructures:

* Other infrastructures focus on adding new optimizations; C– focuses on supporting multiple front ends for multiple languages.

* C– has a machine-level type system, so you don’t have to shoehorn your favorite high-level language into a high-level data model that doesn’t fit.

* C– provides a run-time interface, so you can implement garbage collection and exception handling using the techniques that are best suited to your language.

The run-time interface is the most novel and most distinguishing feature of C–.

via C– Home.

Slashdot | Yahoo Releases Open Source Hadoop Distribution

Yahoo has been a vociferous Apache Hadoop user and supporter for several years now, and uses it extensively within its Search technologies. Hadoop has been gaining popularity in the Cloud Computing space, with companies like the NYTimes converting 4TB and 11 million articles to PDFs in under 24 hours using Hadoop and EC2 in late 2007. Hadoop has been made available in Amazon’s cloud and Yahoo has now released its own Hadoop version.

from Slashdot | Yahoo Releases Open Source Hadoop Distribution.