Also see the list of articles, none to be taken seriously.
Developer talk follows. XCode 4 removes the PowerPC compiler, breaking package installers that try to build universal libraries.
> pip install keyring…
/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/as: assembler (/usr/bin/../libexec/gcc/darwin/ppc/as or /usr/bin/../local/libexec/gcc/darwin/ppc/as) for architecture ppc not installed
Installed assemblers are:
/usr/bin/../libexec/gcc/darwin/x86_64/as for architecture x86_64
/usr/bin/../libexec/gcc/darwin/i386/as for architecture i386
keyring/backends/osx_keychain.c:117: fatal error: error writing to -: Broken pipe
lipo: can't open input file: /var/tmp//cdXmPvrV.out (No such file or directory)
error: command 'gcc-4.2' failed with exit status 1
That was from pip, but distutils, setuptools, easy_install, and "python setup.py install" should all fail with a similar error.
To fix it, tell the compiler explicitly not to bother with PowerPC. Prefix the build or installation command line with this:
ARCHFLAGS="-arch i386 -arch x86_64"
sudo ARCHFLAGS="-arch i386 -arch x86_64" pip install keyring
export ARCHFLAGS="-arch i386 -arch x86_64"
How (not) to write Factorial in Java will hit home for any software developer who’s had to deal with over-engineered code.
I’ve come to view layers of abstraction as costing technical rent. It’s a concept worth distinguishing from technical debt. Rather than pushing a cost into the future, technical rent involves paying a manageable up-front cost by building the abstraction in code, and then needing to pay a similar cost each time programmers revisit the code, by rebuilding the same abstraction in their heads.
The worst part is when the layer of abstraction is justified as an intervention against potential technical debt: a small cost now to avoid interest payments in the future. In reality, the small cost has to be paid over and over, even if it turns out that the requirements never change in the particular direction that the abstraction anticipates.
You could call it defensive abstraction. The logic hides several assumptions:
Occasionally the abstraction does actually provide enough benefits to outweigh its future costs, but failure to recognize the existence of those costs leads to poor decisions.
[Expanded from a comment I made on Hacker News.]