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Understanding typedefs for function pointers in C
...les' code which had typedefs for pointers to functions with arguments. I recall that it took me a while to get around to such a definition while trying to understand a numerical algorithm written in C a while ago. So, could you share your tips and thoughts on how to write good typedefs for pointers ...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...
That is called the shebang line. As the Wikipedia entry explains:
In computing, a shebang (also called a hashbang, hashpling, pound bang, or crunchbang) refers to the characters "#!" when they are the first two characters in an i...
In C++, what is a virtual base class?
...memory layout, you have:
A A
| |
B C
\ /
D
This explain why when call D::foo(), you have an ambiguity problem. But the real problem comes when you want to use a member variable of A. For example, let's say we have:
class A
{
public :
foo() ;
int m_iValue ;
} ;
When you'l...
Difference between GeoJSON and TopoJSON
...ou’re not careful. (See the documentation for topojson -q.)
For server-side manipulation of geometries that does not require topology, then GeoJSON is probably the simpler choice. Otherwise, if you need topology or want to send the geometry over the wire to a client, then use TopoJSON.
...
Why is creating a new process more expensive on Windows than Linux?
...forgetting of course, the 'vfork' command, which is designed for the 'just call exec' scenario you describe.
– Chris Huang-Leaver
Aug 3 '09 at 13:07
4
...
Explain the encapsulated anonymous function syntax
...on:
(function foo() {
alert(2 + 2);
}());
The Parentheses (formally called the Grouping Operator) can surround only expressions, and a function expression is evaluated.
The two grammar productions can be ambiguous, and they can look exactly the same, for example:
function foo () {} // Funct...
Logging uncaught exceptions in Python
...there can be exactly one "uncaught" exception. Also, sys.excepthook is NOT called when an exception is "raised". It is called when the program is going to terminate due to an uncaught exception, which cannot happen more than once.
– Nawaz
Nov 16 '16 at 5:36
...
NSIS学习笔记（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...Location"
${If} $0 != ""
${If} ${FileExists} $0
push $0
Call VerCheck
${VersionCompare} $VersionNumber ${VERSIONLONG} $R0
${if} $R0 == "1"
${Endif}
${if} $R0 == "0"
${Endif}
${if} $R0 == "2"
${Endif}
${EndIf}
${EndIf}
Q 设置...
Is Response.End() considered harmful?
...tered down with the ThreadAbortExceptions from these benign Response.End() calls. I think this is Microsoft's way of saying "Knock it off!".
I would only use Response.End() if there was some exceptional condition and no other action was possible. Maybe then, logging this exception might actually ...
iPhone Simulator location
... edited Jul 8 '15 at 17:29
patridge
25.1k1616 gold badges8585 silver badges129129 bronze badges
answered Oct 4 '14 at 9:44
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