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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...l(143) : error C2784: “bool std::operator <(const std::_Revranit<_RanIt,_Base> &,const std::_Revranit<_RanIt2,_Base2> &)”: 无法从“const a”为“const std::_Revranit<_RanIt,_Base> &”推导 模板 参数
1> f:\vs2008\vc\include\xutility(2046) : 参见“std::operator <”的声...
What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
...
I suggest you do some experiments using "make". Here is a simple demo, showing the difference between = and :=.
/* Filename: Makefile*/
x := foo
y := $(x) bar
x := later
a = foo
b = $(a) bar
a = later
test:
@echo x - $(x)
@echo y - $(y)
@echo a - $(a)
@echo b - $(b)
ma...
(this == null) in C#!
...such method, and even comparing this to null is valid. The error is in the base init line: it is the attempt to pass instance-bounded delegate as a parameter to the base ctor. This is the bug (a hole in sematic checks) in the compiler: it should NOT be possible. You are not allowed to write : base(C...
Getting the class name of an instance?
...nstance of an object in Python if the function I am doing this from is the base class of which the class of the instance has been derived?
...
What does functools.wraps do?
...ors, I don't believe that @wrap will do the job. I have instead created a base decorator class like so:
class DecBase(object):
func = None
def __init__(self, func):
self.__func = func
def __getattribute__(self, name):
if name == "func":
return super(DecBas...
“java.lang.OutOfMemoryError : unable to create new native Thread”
...ads created. The default Thread Stack Size for JRockit 1.5/1.6 is 1 MB for 64-bit VM on Linux OS. 32K threads will require a significant amount of physical and virtual memory to honor this requirement.
Try to reduce the Stack Size to 512 KB as a starting point and see if it helps creating more thr...
Why should I care about lightweight vs. annotated tags?
...
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What is a CSRF token ? What is its importance and how does it work?
...www.mybank.com/transfer?to=123456;amount=10000;token=31415926535897932384626433832795028841971.
That token is a huge, impossible-to-guess random number that mybank.com will include on their own web page when they serve it to you. It is different each time they serve any page to anybody.
The attacke...
How to decide between MonoTouch and Objective-C? [closed]
...n't matter at all. And, just to be clear - I'm going to be submitting a MT-based app to the store soonishly, and I have no problem whatsoever with the size. Doesn't bother me at all. But if that's something that would concern you, then Apple's stack wins this one.
Doing any XML work? MonoTouch. Peri...
Does my application “contain encryption”?
...ermine that your app is not classified under Category 5, Part 2 of the EAR based on the guidance provided by BIS at encryption question. The Statement of Understanding for medical equipment in Supplement No. 3 to Part 774 of the EAR can be accessed at Electronic Code of Federal Regulations site. Ple...