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What are the disadvantages of using persistent connection in PDO
...off. The connection is held open at the process manager level (Apache for mod_php, the current FastCGI process if you're using FastCGI, etc), not at the PHP level, and PHP doesn't tell the parent process to let the connection die when the script terminates abnormally.
If the dead script locked tab...
When is memoization automatic in GHC Haskell?
...ing to some criterion tests I ran anyway, with the functions in a separate module and marked with NOINLINE pragmas). Presumably that's because the list generation and indexing gets fused into a super tight loop anyway.
– mokus
Oct 18 '10 at 14:13
...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...report.txt sys=no explain=no aggregate=yes
$ more report.txt --这个文件包括了启停trace之间所有SQL语句的执行信息，执行计划、统计
【方法四：logminer】
只包含DML与DDL语句，不能查询select语句。另外需要开启supplemental logging，默认是...
Private vs Protected - Visibility Good-Practice Concern [closed]
...ethods protected by default is a mitigation for one of the major issues in modern SW development: failure of imagination.
Rationalization #2: It keeps the public API / Javadocs clean
This one is more reasonable, and depending on the target audience it might even be the right thing to do, but it's wo...
Which parts of Real World Haskell are now obsolete or considered bad practice?
...dboxes
stack, a cross-platform program for developing Haskell projects
ghc-mod, a backend for vim, emacs, Sublime Text and other editors
New/missing language extensions and GHC changes
runtime type polymorphism (:i ($) has changed tremendously)
-XTypeInType
-XDataKinds
-XGADT
-XRankNTypes
-XGene...
Evaluating a mathematical expression in a string
... 2*3**(4^5) / (6 + -7)')
-5.0
"""
return eval_(ast.parse(expr, mode='eval').body)
def eval_(node):
if isinstance(node, ast.Num): # <number>
return node.n
elif isinstance(node, ast.BinOp): # <left> <operator> <right>
return operators[type(n...
How to correctly close a feature branch in Mercurial?
... Changeset A
I may have misunderstood what you wanted but please don't mod down, I took time reproducing your use case : )
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How Drupal works? [closed]
...ter system (MenuAPI) is used to match the requested path to a given plugin module. That plugin module is responsible for building the "primary content" of the page.
Once the primary page content is built, index.php calls theme('page', $content), which hands off the content to Drupal's theming/skinni...
tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
...TIME_WAIT的等待时间
ubuntu机器设置
vi /etc/sysctl.conf
编辑文件，加入以下内容：
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 30
然后执行 /sbin/sysctl -p 让参数生效。
net.ipv4.tcp_syncooki...
VM 磁盘空间扩容引起的一些问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...备中可以认到LUN 60 LUN80 容量显示正确，但不能正确识别文件格式。在ESX1的数据储存中认到LUN60 LUN80的准确容量，在ESX2的数据存储中只能认到LUN60的正确容量，LUN80根本找不到。
ESX2主机在设备
LUN 60一切正常。
为...