General Development Archive

Tuesday, we linked to an interview with one of the creators of AWK, over at ComputerWorld. From the same series comes an interview with Chat Ramney, maintainer of BASH, the Bourne Again Shell. BASH is the default shell on most UNIX systems, and has been ported to Windows, MS-DOS, the Amiga, and just about everywhere else.

AWK is one of the most common UNIX tools to process text-based data in either files or datastreams. Written by Alfred Aho, Peter Weinberger, and Brian Kernighan, AWK "extensively uses the string datatype, associative arrays (that is, arrays indexed by key strings), and regular expressions." ComputerWorld interviewed Alfred Aho.

Cnet reports: "Fedora is the operating system of choice for AllemaniACs' winning robot in the RoboCup, a soccer tournament played between robots. Fedora has fueled AllemaniACs' victories in 2006 and 2007, and appears to be poised to raise the cup again in 2008." For anyone interested in using Fedora in robotics, a special interest group for robotics has been started within the Fedora Project to support such efforts.

Andrew Min gives a taster of the open source goodies being developed at Google's Summer of Code: a GUI for Aptitude, a GUI for Grub 2, search based menu browsing for GIMP and Audacity file import/export with FFmpeg amongst others. Read (or listen to) to the full article at Freesoftware Magazine

Ars' Peter Bright wrote an article today entitled "From Win32 to Cocoa: a Windows user's conversion to Mac OS X", in which he explains why he believes "Windows is dying, Windows applications suck, and Microsoft is too blinkered to fix any of it". These are rather harsh words, but there is a definitive element of truth in it. The article is part one in a three-part series.

Geek.com is running an opinion piece on the extensive reliance of programmers today on languages like Java and .NET. The author lambastes the performance penalties that are associated with running code inside virtualised environments, like Java's and .NET's. "It increases the compute burden on the CPU because in order to do something that should only require 1 million instructions (note that on modern CPUs 1 million instructions executes in about one two-thousandths (1/2000) of a second) now takes 200 million instructions. Literally. And while 200 million instructions can execute in about 1/10th of a second, it is still that much slower." The author poses an interesting challenge at the end of his piece - a challenge most OSNews readers will have already taken on. Note: Please note that many OSNews items now have a "read more" where the article in question is discussed in more detail.

"Microsoft today announced its first collaboration with the open source Eclipse Foundation by committing provide engineering support to allow the Eclipse Standard Widget Toolkit use Microsoft's Windows Presentation Foundation. The move aims to make it easier for Java developers to write applications that look and feel like native Windows Vista, according to Microsoft."

Google announced the participating Open Source Projects this Monday. Following that, students are encouraged to select projects they are interested in and submit their work proposals from March 24 to 31. Among the participating projects are: Debian, DragonFly BSD, ES operating system, FreeBSD, Gentoo, GNU Hurd, Haiku, Linux, NetBSD, and openSuse. Overall, projects range from kernel hacking to web applications. Last year, 900 students were accepted, with Google paying them and their mentoring projects up to USD 4.5 Million.

The Mac and iPhone SDK are based on the Objective-C programming language, a surprising alliance of C and Smalltalk. Features such as meta-classes, message sending, dynamism, C compatibility, etc., contribute to define the development experience on Apple's platforms. Here is a little list of things that, in Philippe Mougin's experience, contribute to make Objective-C a powerful and fun programming language.

The GNU project has released version 4.3.0 of the GNU Compiler Collection. "The GNU project and the GCC developers are pleased to announce the release of GCC 4.3.0. This release is a major release, containing new features (as well as many other improvements) relative to GCC 4.2.x."

LLVM 2.2 has been released. Wikipedia summarises: "The Low Level Virtual Machine, generally known as LLVM, is a compiler infrastructure, written in C++, which is designed for compile-time, link-time, run-time, and 'idle-time' optimization of programs written in arbitrary imperative programming languages. The LLVM project started in 2000 at the University of Illinois at Urbana-Champaign."

How do you recognize good programmers if you're a business guy? It's not as easy as it sounds. CV experience is only of limited use here, because great programmers don’t always have the "official" experience to demonstrate that they're great. In fact, a lot of that CV experience can be misleading. Yet there are a number of subtle cues that you can get, even from the CV, to figure out whether someone's a great programmer. More here.

"This site is about Arc, a new dialect of Lisp. It's unfinished, but usable, so we decided to release what we have so far. The current version compiles into MzScheme and structurally is as much a skin on MzScheme as a separate language. For example, Arc's read is MzScheme's, and so are Arc's numbers and math operations. But from the average programmer's point of view, Arc is no more similar to Scheme than any two Lisp dialects are to one another. Arc is designed above all for exploratory programming: the kind where you decide what to write by writing it. A good medium for exploratory programming is one that makes programs brief and malleable, so that's what we've aimed for. This is a medium for sketching software."

PT_DENY_ATTACH is a non-standard ptrace() request type that prevents a debugger from attaching to the calling process. Adam Leventhal recently discovered that Leopard extends PT_DENY_ATTACH to prevent introspection into processes using dtrace. This article will cover disabling PT_DENY_ATTACH for all processes on Mac OS X 10.5. Over the previous few years, I've provided similar hacks for both Mac OS X 10.4, and 10.3.