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Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...服务器，公司全部员工使用统一的域名，内网IP为：192.168.0.115
操作系统：RHEL5
所用软件列表：
mysql-5.5.20
postfix-2.9.1
courier-authlib-0.62.4.tar.bz2
extmail-1.2.tar.gz
extman-1.1.tar.gz
Unix-Syslog-1.1.tar.gz
perl-GD-2.35-1.el5.rf.i386.rpm
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How to get the primary IP address of the local machine on Linux and OS X? [closed]
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488
Use grep to filter IP address from ifconfig:
ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[...
Parsing JSON array into java.util.List with Gson
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edited Jun 27 '17 at 9:48
answered Aug 31 '13 at 11:32
Mi...
How did I get a value larger than 8 bits in size from an 8-bit integer?
.... But that doesn't explain how c is getting an impossible value. As an 8-bit integer, how can c hold values greater than its bit-width?
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C pointer to array/array of pointers disambiguation
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int* arr[8]; // An array of int pointers.
int (*arr)[8]; // A pointer to an array of integers
The third one is same as the first.
The general rule is operator precedence. It can get even much more complex as function pointers come ...
UTF-8: General? Bin? Unicode?
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In general, utf8_general_ci is faster than utf8_unicode_ci, but less correct.
Here is the difference:
For any Unicode character set, operations performed using the _general_ci collation are faster than those for the _unicode_ci collati...
cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...d指令cpuid就是一条读取CPU各种信息的一条指令，大概是从80486的某个版本开始就存在了。 CPUID这条指令，除了用于识别CPU（CPU的型号...cpuid指令
cpuid就是一条读取CPU各种信息的一条指令，大概是从80486的某个版本开始就存在了...
Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
...nal
Write or paste in: defaults write org.R-project.R force.LANG en_US.UTF-8
Close Terminal (including any RStudio window)
Start R
For someone runs R in a docker environment (under root), try to run R with below command,
LC_ALL=C.UTF-8 R
# instead of just `R`
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All combinations of a list of lists
...oduct:
>>> import itertools
>>> a = [[1,2,3],[4,5,6],[7,8,9,10]]
>>> list(itertools.product(*a))
[(1, 4, 7), (1, 4, 8), (1, 4, 9), (1, 4, 10), (1, 5, 7), (1, 5, 8), (1, 5, 9), (1, 5, 10), (1, 6, 7), (1, 6, 8), (1, 6, 9), (1, 6, 10), (2, 4, 7), (2, 4, 8), (2, 4, 9), (2, 4,...
Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha
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answered Feb 28 '12 at 7:32
npintinpinti
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