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Mozilla PDF.js：PDF在线预览 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...What browsers are supported?支持哪些浏览器?
The goal is to support all HTML5 compliant browsers, but sincefeature support varies per browser/version our support for all PDF featuresvaries as well. If you want to support more browsers than Firefox you'll needto include compatibility.jswhich h...
PHP mkdir: Permission denied problem
...er window and from the menu bar, choose Go > Go To Folder > /private/etc/apache2
now open httpd.conf
find:
User _www
Group _www
change the username:
User <YOUR LOGIN USERNAME>
Now restart apache by running this form terminal:
sudo apachectl -k restart
If it still doesn't work...
Circular list iterator in Python
...n l:
print i
all of which print:
>>>
a
b
c
d
a
b
c
d
...etc.
of the three I'd be prone to the append(pop()) approach as a function
servers = ['a','b','c','d']
def rotate_servers(servers):
servers.append(servers.pop(0))
return servers
while 1:
servers = rotate_serv...
How do I change bash history completion to complete what's already on the line?
...
You may need to enabled bash completion.
Check
/etc/profile
/etc/bash.bashrc
~/.bashrc
to see if any of the above files source /etc/bash_completion. i.e.
. /etc/bash_completion
If /etc/bash___completion is not sourced by any of the above files you will need to add i...
What are the main performance differences between varchar and nvarchar SQL Server data types?
...
What about index size, memory usage etc? I assume you always use int when you could use tinyint too "just in case"?
– gbn
Jul 9 '10 at 7:02
...
How to determine SSL cert expiration date from a PEM encoded certificate?
...s in order of their expiration, most recently expiring first.
for pem in /etc/ssl/certs/*.pem; do
printf '%s: %s\n' \
"$(date --date="$(openssl x509 -enddate -noout -in "$pem"|cut -d= -f 2)" --iso-8601)" \
"$pem"
done | sort
Sample output:
2015-12-16: /etc/ssl/certs/Staat_der_Ned...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
...us
工具安装
在主库服务器安装
#安装依赖包 # yum install perl-DBI perl-DBD-MySQL perl-TermReadKey perl-Time-HiRes #安装工具 # wget percona.com/get/percona-toolkit.tar.gz # tar zxvf percona-toolkit-2.2.14.tar.gz # cd percona-toolkit-2.2.14 # perl Makefile.PL && make && ma...
原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
原子vector的一种实现源码(atomic-vector)atomic-vector来自Facebook的一种实现，源码如下： * +----------------------------------------------------------------------+ | HipHop for PHP 来自Facebook的一种实现，源码如下：
/*
+--------------------...
What is a mixin, and why are they useful?
...rMixin, Parent): pass and class NewChildN(NewBehaviorMixin, ChildN): pass, etc. (PS: Do you know a better way?)
– RayLuo
Oct 18 '16 at 0:57
|
...
Why 0 is true but false is 1 in the shell?
...l kinds of information about the failure - why it happened, how to fix it, etc. Having zero mean 'success' and non-zero mean failure lets you can check pretty easily for success, and investigate the particular error for more details if you want to. A lot of APIs and frameworks have a similar conve...