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What is an OS kernel ? How does it differ from an operating system? [closed]
...ernel is an operating system in that sense.
The end-user definition is usually something around "a software package that provides a desktop, shortcuts to applications, a web browser and a media player". A kernel doesn't match that definition.
So for an end-user a Linux distribution (say Ubuntu) is...
Is there a performance impact when calling ToList()?
...on) constructor. This constructor must make a copy of the array (more generally IEnumerable<T>), otherwise future modifications of the original array will change on the source T[] also which wouldn't be desirable generally.
I would like to reiterate this will only make a difference with a hu...
Pass correct “this” context to setTimeout callback?
...or this case, for map(), for forEach(), etc., etc., using less code, fewer CPU cycles, and less memory. ***See: Misha Reyzlin's answer.
– HoldOffHunger
Oct 20 '17 at 17:06
ad...
Using Phonegap for Native Application development [closed]
... is forum's experience with Phonegap. What are the pain points and is it really scalable for enterprise level application development.
...
What's the state of the art in email validation for Rails?
... answered Aug 24 '10 at 9:56
HallelujahHallelujah
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Java内存泄露原因详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...果不可到达，则就将其回收，这样也可以消除引用循环的问题。在Java语言中，判断一个内存空间是否符合垃圾收集标准有两个：一个是给对象赋予了空值null，以下再没有调用过，另一个是给对象赋予了新值，这样重新分配了内...
What is the performance cost of having a virtual method in a C++ class?
...3ghz in-order PowerPC processor. On that architecture, a virtual function call costs 7 nanoseconds longer than a direct (non-virtual) function call.
So, not really worth worrying about the cost unless the function is something like a trivial Get()/Set() accessor, in which anything other than inli...
2015互联网结束补贴战 从相杀到相爱只需一个长假 - 资讯 - 清泛网 - 专注C/...
...
逐利合并结束补贴战
滴滴和快的合并后，外界最关心的问题是以后用手机叫车还有补贴吗？
在2015年第一财季，58同城净亏损5240万美元。而滴滴和快的之间的补贴烧钱大战也是愈演愈烈。“有一天，我们甚至烧掉了1000万美元...
浅谈HTML5 & CSS3的新交互特性 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...等。而CSS则是专门用来控制网页显示效果的语言。这时候问题出来了，为什么我们要单独使用CSS呢，HTML不是一样可以控制Web页面的显示效果么？为了回答这个问题，我举个简单的例子：
有没有发现如果一旦形容的事情过多，...
How do I print a list of “Build Settings” in Xcode project?
... 4.1
ACTION build
AD_HOC_CODE_SIGNING_ALLOWED NO
ALTERNATE_GROUP staff
ALTERNATE_MODE u+w,go-w,a+rX
ALTERNATE_OWNER username
ALWAYS_SEARCH_USER_PATHS YES...