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How to use shell commands in Makefile
... != command args... in several make variants, including all modern GNU and BSD variants as far as I know. These other variants do not have $(shell) so using VAR != command args... is superior in both being shorter and working in more variants.
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How to check if a variable is set in Bash?
...ons, e.g. [ -z "" -a -z ${var+x} ] gets bash: [: argument expected in bash 4.3-ubuntu (but not e.g. zsh). I really dislike the answer using a syntax that happens to work in some cases.
– FauxFaux
Jun 11 '15 at 11:32
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Find when a file was deleted in Git
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BSD/OSX sed is apparently not always good with semicolons as command separators. Try changing them into newlines, or switch to sed -n -e '/^commit/h' -e '\:/some_dir/:{' -e G -e 's/\ncommit \(.*\)/ \1/gp' -e }
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How to define hash tables in Bash?
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Which version of bash supports mkdir -d? (Not 4.3, on Ubuntu 14. I'd resort to mkdir /run/shm/foo, or if that filled up RAM, mkdir /tmp/foo.)
– Camille Goudeseune
Aug 22 '17 at 21:56
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How to find out the number of CPUs using python
...> 0:
return res
except ImportError:
pass
# BSD
try:
sysctl = subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
stdout=subprocess.PIPE)
scStdout = sysctl.communicate()[0]
res = int(scStdout)
if res >...
Is System.nanoTime() completely useless?
... I don't suppose there are updated on this, wrt. behavior on Linux, BSD or other platforms?
– Tomer Gabel
Dec 11 '13 at 14:55
6
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What is the difference between pip and conda?
... installation).
In both cases:
Written in Python
Open source (Conda is BSD and pip is MIT)
The first two bullet points of Conda are really what make it advantageous over pip for many packages. Since pip installs from source, it can be painful to install things with it if you are unable to comp...
Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的。该UNIX 用户组原来试图将AT&T 的系统V 和Berkeley CSRG的BSD 系统的调用接口之间的区别重新调和集成，从而于1984 年产生了/usr/group 标准。1985 年，IEEE操作系统技术委员会标准小组委员会（TCOS-SS）开始在ANSI 的支持下责成IEEE 标准...
@import vs #import - iOS 7
...e iOS 7 or Mavericks SDK, but you can still release for older OSs (say iOS 4.3 or whatever). Modules don't change how your code is built or any of the source code.
From the WWDC slides:
Imports complete semantic description of a framework
Doesn't need to parse the headers
Better way to import a f...
Entity Framework code first unique column
I am using Entity Framework 4.3 and using Code Fist.
6 Answers
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