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What's the difference between :: (double colon) and -> (arrow) in PHP?
... resolution, and it may have either a class name, parent, self, or (in PHP 5.3) static to its left. parent refers to the scope of the superclass of the class where it's used; self refers to the scope of the class where it's used; static refers to the "called scope" (see late static bindings).
The r...
How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
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I had same issue with primefaces 5.3 and I went through all the points described by BalusC with no result. I followed his advice of debugging FileUploadRenderer#decode() and I discovered that my web.xml was unproperly set
<context-param>
<param-n...
When to use static vs instantiated classes
...'d use (and I've used them to mimic the JavaScript prototype object in PHP 5.3) static members is when I know that the respective field will have the same value cross-instance. At that point you can use a static property and maybe a pair of static getter/setter methods. Anyway, don't forget to add p...
Performance of FOR vs FOREACH in PHP
...for just the reference is actually less than copying the array (this is on 5.3.2)... So it appears (on 5.3.2 at least) as if references are significantly faster...
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淘宝网采用什么技术架构来实现网站高负载的 - 更多技术 - 清泛网 - 专注C/C...
...的过程中，我们所说的拆分就出现V2.2和V3.0之 间。在V2.2版 本中，淘宝几乎所有的逻辑都放在(Denali)系统中，这样导致的问题就是系统扩展和修改非常麻烦，并且更加致命的是随着淘宝业务量的增加，如果按照V2.2的架构已经没有...
Correct way to delete cookies server-side
...er or any spec-compliant user agent. tools.ietf.org/search/rfc6265#section-5.3 dictates that "The user agent MUST evict all expired cookies from the cookie store if, at any time, an expired cookie exists in the cookie store." and to the best of my knowledge that is what every browser in fact does.
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How do I choose grid and block dimensions for CUDA kernels?
.../64k/32k/64k registers total
(Compute 1.0,1.1/1.2,1.3/2.x-/3.0/3.2/3.5-5.2/5.3/6-6.1/6.2/7.0)
Each block cannot consume more than 16kb/48kb/96kb of shared memory (Compute
1.x/2.x-6.2/7.0)
If you stay within those limits, any kernel you can successfully compile will launch without error.
Performance...
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
...kafka有两种，
RabbitMQ,遵循AMQP协议，由内在高并发的erlanng语言开发；kafka是Linkedin于2010年12月份开源的消息发布订阅系统,它主要用于处理活跃的流式数据,大数据量的数据处理上。
对消息一致性要求比较高的场合需要有应答确认...
How to turn on (literally) ALL of GCC's warnings?
...CC and Clang versions (currently Clang 3.2 through 3.7 and GCC 3.4 through 5.3).
https://github.com/barro/compiler-warnings
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Approximate cost to access various caches and main memory?
... 1.2 ns )
local L2 CACHE hit, ~10 cycles ( 5.3 - 3.0 ns )
local L3 CACHE hit, line unshared ~40 cycles ( 21.4 - 12.0 ns )
local L3 CACHE hit, shared line in another core ~65 cycles ( 34.8 - 19.5 ns )
local L3 CACHE hit, modified in another core ...