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What is the difference between `git merge` and `git merge --no-ff`?
... branch and you want to ensure it looks that way when reading history). In order to do that, you can pass the --no-ff flag and git merge will always construct a merge instead of fast-forwarding.
Similarly, if you want to execute a git pull or use git merge in order to explicitly fast-forward, and y...
Adding minutes to date time in PHP
...ck with adding X minutes to a datetime, after doing lots of google'ing and PHP manual reading, I don't seem to be getting anywhere.
...
How can I remove duplicate rows?
...VER (PARTITION BY Col1, Col2, Col3
ORDER BY ( SELECT 0)) RN
FROM #MyTable)
DELETE FROM cte
WHERE RN > 1;
I am using ORDER BY (SELECT 0) above as it is arbitrary which row to preserve in the event of a tie.
To preserve the latest one in RowID...
内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
...管理的重要性
存在内存错误的 C 和 C++ 程序会导致各种问题。如果它们泄漏内存，则运行速度会逐渐变慢，并最终停止运行；如果覆盖内存，则会变得非常脆弱，很容易受到恶意用户的攻击。从 1988 年著名的莫里斯蠕虫 攻击到...
cleanest way to skip a foreach if array is empty [duplicate]
...oid nesting my code with an unnecessary if statement. If $items is empty php throws an error.
11 Answers
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upstream sent too big header while reading response header from upstream
...ove the message, is it streaming with logged lines preceding the message? PHP message: PHP Notice: Undefined index:
Example snippet from a loop my log file:
2015/11/23 10:30:02 [error] 32451#0: *580927 FastCGI sent in stderr: "PHP message: PHP Notice: Undefined index: Firstname in /srv/www/class...
How can I write to the console in PHP?
... debugging tool called Chrome Logger or webug (webug has problems with the order of logs).
More recently Clockwork is in active development which extends the Developer Tools by adding a new panel to provide useful debugging and profiling information. It provides out of the box support for Laravel 4...
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
VM 磁盘空间扩容引起的一些问题TOP如下存储分区如下ESX1下挂载情况如下图ESX2下挂载情况如下图现在有个需求，lun60的空间偏大，缩小为1T，LUN80的空间偏小，扩大为1.5T先...TOP 如下
存储分区如下
ESX1下挂载情况如下图
...
PHP: Storing 'objects' inside the $_SESSION
... is made, the class declaration/definition has already been encountered by PHP or can be found by an already-installed autoloader. otherwise it would not be able to deserialize the object from the session store.
share
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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...定的局部性的特征，利用局部性的原理将海量数据计算的问题分而治之。
MR模型是无共享的架构，数据集分布至各个节点。处理时，每个节点就近读取本地存储的数据处理(map)，将处理后的数据进行合并(combine)、排序(shuffle and so...