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Unicode与UTF-8互转(C语言实现) - C/C++ - 清泛网 - 专注C/C++及内核技术
...编码方案. Unicode的学名是"Universal Multiple-Octet Coded Character Set",
简称为UCS. UCS可以看作是"Unicode Character Set"的缩写.
Unicode当然是一个很大的集合, 现在的规模可以容纳100多万个符号. 每个符号的编码都
不一样, 比如, U+0639表示阿拉...
Remove a string from the beginning of a string
...
Plain form, without regex:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
if (substr($str, 0, strlen($prefix)) == $prefix) {
$str = substr($str, strlen($prefix));
}
Takes: 0.0369 ms (0.000,036,954 seconds)
And with:
...
How do I use 'git reset --hard HEAD' to revert to a previous commit? [duplicate]
...
First, it's always worth noting that git reset --hard is a potentially dangerous command, since it throws away all your uncommitted changes. For safety, you should always check that the output of git status is clean (that is,...
What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
...h> is either a specific file or a directory to be
set as the root of the web server. Use this if you
have a directory full of HTML, cgi, php3, epy, or rpy
files or any other files that you want to be served up
...
Which is faster: Stack allocation or Heap allocation
...ation took 0.15354 seconds, heap allocation took 0.834044 seconds with -O0 set, making Linux heap allocation only slower on a factor of about 5.5 on my particular machine.
– Taywee
Oct 13 '13 at 12:06
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How do I skip an iteration of a `foreach` loop?
In Perl I can skip a foreach (or any loop) iteration with a next; command.
8 Answers
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How to enable MySQL Query Log?
...log #works for mysql < 5.1.29
Also, to enable it from MySQL console
SET general_log = 1;
See http://dev.mysql.com/doc/refman/5.1/en/query-log.html
For mysql 5.1.29+
With mysql 5.1.29+ , the log option is deprecated. To specify the logfile and enable logging, use this in my.cnf in the [mys...
Error - trustAnchors parameter must be non-empty
...d my truststore in ${CATALINA_HOME}\conf but CATALINA_HOME was not getting set so Tomcat was looking under \conf for the truststore.
– SingleShot
Feb 21 '12 at 21:03
4
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Why doesn't print work in a lambda?
...ion. In Python 2.x, print is a statement. However, in Python 3, print is a function (and a function application is an expression, so it will work in a lambda). You can (and should, for forward compatibility :) use the back-ported print function if you are using the latest Python 2.x:
In [1324]: fro...
Print number of keys in Redis
... indicates total no of keys and 'expires' indicates no of keys with expiry set. Essentially it means that they have a ttl set and they are set to expire, not that they have expired.
– s1d