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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
I'm trying to learn shell scripting, and I need to understand someone else's code. What is the $? variable hold? I can't Google search the answer because they block punctuation characters.
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Admob Error in Eclipse for android:configChanges
Eclipse is giving me an error on the android:configChanges line in my AndroidManifest.xml:
7 Answers
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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...安装最新的稳定版，激活WITH_INNODB_MEMCACHED即可：
shell> groupadd mysql
shell> useradd -r -g mysql mysql
shell> tar zxvf mysql-<VERSION>.tar.gz
shell> cd mysql-5.6.13
shell> cmake . -DWITH_INNODB_MEMCACHED=ON
shell> make
shell> make install
shell> cd /usr/local/mysql
shell> ...
How to save and restore multiple different sessions in Vim?
Depending on my task in Vim I have several tabs open.
14 Answers
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How to get the command line args passed to a running process on unix/linux systems?
On SunOS there is pargs command that prints the command line arguments passed to the running process.
13 Answers
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C++: what regex library should I use? [closed]
I'm working on a commercial (not open source) C++ project that runs on a linux-based system. I need to do some regex within the C++ code. (I know: I now have 2 problems.)
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How can I know if a branch has been already merged into master?
I have a git repository with multiple branches.
9 Answers
9
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How to write a large buffer into a binary file in C++, fast?
I'm trying to write huge amounts of data onto my SSD(solid state drive). And by huge amounts I mean 80GB.
12 Answers
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How can I check if a file exists in Perl?
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Test whether something exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at t...
How do i find out what all symbols are exported from a shared object?
...AIX), a UNIX shared library, or a Windows DLL? These are all different things, and your question conflates them all :-(
For an AIX shared object, use dump -Tv /path/to/foo.o.
For an ELF shared library, use readelf -Ws /path/to/libfoo.so, or (if you have GNU nm) nm -D /path/to/libfoo.so.
For a non-...