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Why is NaN not equal to NaN? [duplicate]
...nction; one of the examples given in the linked document is finding the zeros() of a function f(). It is entirely possible that in the process of probing the function with guess values that you will probe one where the function f() yields no sensible result. This allows zeros() to see the NaN and co...
Removing projects in Sublime Text 2 and 3
...on 2: The manual way (but with control of which projects are removed):
Close Sublime Text
Locate the Session.sublime_session file using the paths below and open it with another code editor. * DO NOT open it with Sublime Text as any changes you make will be overwritten. *
Paths to Session.sublime_...
How to style the option of an html “select” element?
...cause this type of element is an example of a "replaced element". They are OS-dependent and are not part of the HTML/browser. It cannot be styled via CSS.
There are replacement plug-ins/libraries that look like a <select> but are actually composed of regular HTML elements that CAN be styled.
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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...于很多编译器都不能编译CPUID指令，所以了解CPUID指令的操作码是必要的，CPUID指令的操作码是：
0FA2h
3、返回基本信息的功能全貌
在实际介绍每一个功能之前，我们先通过一张图了解一下返回基本信息的功能全貌。
...
What do pty and tty mean?
... terminal. (Called teletype because that's what we had for terminals in those benighted days.)
A pty is a pseudotty, a device entry that acts like a terminal to the process reading and writing there, but is managed by something else. They first appeared (as I recall) for X Window and screen and th...
What are the differences between poll and select?
I am referring to the POSIX standard select and poll system C API calls.
3 Answers
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throwing exceptions out of a destructor
Most people say never throw an exception out of a destructor - doing so results in undefined behavior. Stroustrup makes the point that "the vector destructor explicitly invokes the destructor for every element. This implies that if an element destructor throws, the vector destruction fails... The...
快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...出现问题，在书写的时候就会变得很麻烦。为了便于这个操作，我们可以将一个样式放在另一个样式当中。如：
.text-overflow {
display:block;/*内联对象需加*/
word-break:keep-all;/* 不换行 */
white-space:nowrap;/* 不换行 */
over...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII
... no bytes above 0x7F, then it's ASCII. (Or a 7-bit ISO646 encoding, but those are very obsolete.)
UTF-8
If your data validates as UTF-8, then you can safely assume it is UTF-8. Due to UTF-8's strict validation rules, false positives are extremely rare.
ISO-8859-1 vs. windows-1252
The only diff...
Why does this method print 4?
... for 1 recursive call (1 more than original), the memory use is M + R. Suppose that StackOverflowError is thrown after C successful recursive calls, that is, M + C * R <= X and M + C * (R + 1) > X. At the time of the first StackOverflowError, there's X - M - C * R memory left.
To be able to r...