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Double not (!!) operator in PHP
...for any true value (numbers other than zero, non-empty strings and arrays, etc.) you will get the boolean value TRUE, and for any false value (0, 0.0, NULL, empty strings or empty arrays) you will get the boolean value FALSE.
It is functionally equivalent to a cast to boolean:
return (bool)$row;
...
Interface or an Abstract Class: which one to use?
...ful, but can come in handy in some architectures.
– netcoder
Jun 16 '11 at 14:18
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User recognition without cookies or local storage
...verse Geocoding
Architecture, OS Language, System Time, Screen Resolution, etc.
Network Information API
Battery Status API
The items I listed are, of course, just a few possible ways a user can be identified uniquely. There are many more.
With this set of Random Data elements to build a Data Pro...
How to force the browser to reload cached CSS/JS files?
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@AlixAxel: No, browsers will re-fetch it when the parameter changes, but some public proxies won't cache files with url parameters, so the best practice is to include the version in the path. And the mod_rewrite overhead is miniscule compared to every other ...
Make a link use POST instead of GET
...s of the <a> also for the button, to create rules for hover, visited etc. Otherwise it will of course do the job, but it will look ugly. With the other solutions you simply don't need to change any CSS, you just get an <a> element like all the other you already have. Of course pure HTML ...
马云：互联网时代已经过去20年，接下来30年才是关键 - 资讯 - 清泛网 - 专...
...母借钱，想朋友借，如果大家都不借给你，说明你人品有问题。”
随着时间推进，马云越发逸兴遄飞，妙语不断。他甚至很认真对近2000名年轻人说：“你们要在一两年超过我们，是不可能的，除非我们实在愚蠢。但是如果给你...
How can I capture the result of var_dump to a string?
...ugging because you couldn't do a browser search for (int) or (string)` and etc. It also mangles alot of information into a small space, just try: var_export(''); var_export('\'');. And most importantly, get ready for PHP Fatal error: Nesting level too deep - recursive dependency? in C:\path\file.ph...
简单谈谈软件配置管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...QA监督配置审计是否按照标准流程来进行，并记录不一致问题。
f）每次配置审计要将审计结果记录到《配置审计报告》中，记录和跟踪配置审计检查出的问题。
物理审计的方法：
根据《配置审计检查单》去检查，该有的配置...
据说这是一个程序员的手机......... - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...坏在半路上了。于是两位工程师和一位经理就如何修车的问题展开了讨论。硬件工程师说：“我可以用随身携带的瑞士军刀把车坏的部分拆下来，找出原因，排除故障。”项目经理说：“根据经营管理学，应该召开会议，根据问...
VS Debug调试模式下内存泄露检测原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...前已经释放过了，或者根本就没分配过，可能存在潜在的问题）。程序退出的时候，如果链表还有数据，说明存在内存泄露，输出链表中的数据。
MS CRT已支持内存泄露的检测，使用MFC向导生成的工程，在DEBUG模式下，默认会...