大约有 19,000 项符合查询结果（耗时：0.0402秒） [XML]
Why use a READ UNCOMMITTED isolation level?
... will in practice be writing corrupted data. Also the article stated that "MySQL, which grew up on web apps, is much less pessimistic out of the box than SQL Server". Not true, Sql Server works at read-commited level by default, while MySQL works at repeatable-reads by default, five levels away from...
Redis消息通知系统的实现 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...PELINE的十倍。
查询
我们用Redis命令行来演示一下用户是如何查询消息的。
先插入三条消息，其<MSGID>分别是1，2，3：
redis> HMSET msg:1 title title1 content content1
redis> HMSET msg:2 title title2 content content2
redis> HMSET msg:3 title title3 content ...
How to force the browser to reload cached CSS/JS files?
...($file)
{
if(strpos($file, '/') !== 0 || !file_exists($_SERVER['DOCUMENT_ROOT'] . $file))
return $file;
$mtime = filemtime($_SERVER['DOCUMENT_ROOT'] . $file);
return preg_replace('{\\.([^./]+)$}', ".$mtime.\$1", $file);
}
Now, wherever you include your CSS, change it from this:
<lin...
Best way to load module/class from lib folder in Rails 3?
...odules you want to be autoloadable.
# config.autoload_paths += %W(#{config.root}/extras)
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Network tools that simulate slow network connection [closed]
...e a public internet service on coffee shop wifi: sudo tc qdisc add dev lo root netem delay 500ms
– Sam Stokes
May 12 '10 at 21:21
7
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AWS Difference between a snapshot and AMI
...on't recommend them for beginners. An instance-store AMI is a copy of the root instance-store volume plus some metadata, all saved in an S3 bucket in a special format
EBS boot. This is probably what you are using. An EBS boot AMI is an EBS snapshot of the EBS root volume plus some metadata like t...
Unable to find valid certification path to requested target - error even after cert imported
...) - and the fact that your own identity also has a 'chain' of trust to the root - which is separate from any chain to a root you need to figure out 'who' you trust.
all turn on all debugging
ssl turn on ssl debugging
The following can be used with ssl:
record enab...
generate days from date range
...
The question is mysql tagged...
– Sebastian Palma
Aug 31 at 18:48
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What is the use of “assert” in Python?
... errors. The goal of using assertions is to let developers find the likely root cause of a bug more quickly. An assertion error should never be raised unless there’s a bug in your program.
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How can I get the version defined in setup.py (setuptools) in my package?
...ead that file during setup.py.
version_file = open(os.path.join(mypackage_root_dir, 'VERSION'))
version = version_file.read().strip()
The same VERSION file will then work exactly as well in any other program, even non-Python ones, and you only need to change the version string in one place for al...