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Is there a typical state machine implementation pattern?
...&data );
// do other program logic, run other state machines, etc
}
}
This can of course be extended to support multiple state machines, etc. Transition actions can be accommodated as well:
typedef void transition_func_t( instance_data_t *data );
void do_initial_to_foo( instance...
Apache .htaccess 禁止访问某目录方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...禁止的目录中的.htaccess文件中添加一下两行代码。
order allow,deny
deny from all
(可以把all换成某一ip地址)最简单方法，在所要禁止的目录中的.htaccess文件中添加一下两行代码。
order allow,deny
deny from all
(可以把all换成某一ip地...
Advantage of creating a generic repository vs. specific repository for each object?
...testing in parallel. Then, as I find I need specific queries on the repo, etc, I start replacing that dependency w/ the specific one if needed and going from there. One underlying impl. is easy to create and use (and possibly hook to an in-memory db or static objects or mocked objects or whatever)...
Where is Erlang used and why? [closed]
...ommon applications for Erlang as been covered (CouchDb, ejabberd, RabbitMQ etc) but I would like to contribute the following.
The reason why it is used in these applications comes from the core strength of Erlang: managing application availability.
Erlang was built from ground up for the telco env...
How to install latest version of git on CentOS 7.x/6.x
...ocal/git install
#
# echo 'export PATH=$PATH:/usr/local/git/bin' >> /etc/bashrc
# or
# echo 'export PATH=$PATH:/usr/local/git/bin' > /etc/profile.d/git.sh
#
# source /etc/bashrc
HINT 1:
Updated method of adding compiled git bin directory to bashrc. Because echo "export PATH=$PATH:/...
Why is “if not someobj:” better than “if someobj == None:” in Python?
... does not explain that tuples, lists, dicts, strs, unicodes, ints, floats, etc. have a nonzero. It is much more common to rely on the truth value of built-in type than to rely on a custom nonzero method.
– ddaa
Sep 19 '08 at 11:32
...
Putty: Getting Server refused our key Error
...
@user1046647 LogLevel is defined in /etc/ssh/sshd_config. The default log is /var/log/auth.log unless defined otherwise in sshd_config.
– Axel Kemper
Feb 8 '15 at 15:10
...
解决：error while loading shared libraries: libpcre.so.1: cannot open ...
...件的位置（可以使用命令 whereis xxx ），并把目录添加到/etc/ld.so.conf.d/libc.conf中，没有则新建这个文件。然后再运行ldconfig才可以生效。
解决：用以下shell命令解决：（用root用户）
echo "/usr/local/lib" >> /etc/ld.so.conf.d/libc.conf
sudo...
Finding current executable's path without /proc/self/exe
... SunOS, Solaris, SYSV, HPUX, Concentrix, SCO, Darwin, AIX, OS X, Nextstep, etc. And with a little modification probably VMS, VM/CMS, DOS/Windows, ReactOS, OS/2, etc. If a program was launched directly from a GUI environment, it should have set argv[0] to an absolute path.
Understand that almos...
How to change the CHARACTER SET (and COLLATION) throughout a database?
...
_bin -- just compare the bits; don't consider case folding, accents, etc
_ci -- explicitly case insensitive (A=a) and implicitly accent insensitive (a=á)
_ai_ci -- explicitly case insensitive and accent insensitive
_as (etc) -- accent-sensitive (etc)
_bin -- simple, fast
_ge...