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One DbContext per web request… why?
...simultaneously (which is very common of course). But I expect you already know that and just want to know why not to just inject a new instance (i.e. with a transient lifestyle) of the DbContext into anyone who needs it. (for more information about why a single DbContext -or even on context per thre...
What is the correct answer for cout
...nation. With the calls you expained it would be undefined behaviour. But now, I have one more question (may be siller one, and I missing something basic and thinking loud) How did you deduce that the global version of std::operator<<() would be called instead of ostream::operator<<() ...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...d by the process. See below for a brief description of kernel mode (also known as 'supervisor' mode) and the system call mechanism.
User+Sys will tell you how much actual CPU time your process used. Note that this is across all CPUs, so if the process has multiple threads (and this process is ru...
Error starting jboss server
...ling my OS, and as always install and test standard tools which I use, and now I get this error like never before when I tried to start Jboss 5 from eclipse, its quite big exeption :
...
Maven equivalent for python [closed]
...int to The Python Packaging User Guide since it is the authoritative guide now.
– kojiro
May 24 '16 at 20:16
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How to make certain text not selectable with CSS [duplicate]
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As of 2016, as simple user-select is enough now.
– Konstantin Schubert
Dec 23 '16 at 13:52
2
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JS strings “+” vs concat method [duplicate]
I have some experience with Java and I know that strings concatenation with "+" operator produces new object.
5 Answers
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What does pythonic mean? [closed]
...ight use
for i in (i; i < items.length ; i++)
{
n = items[i];
... now do something
}
In Python we can try and replicate this using while loops but it would be cleaner to use
for i in items:
i.perform_action()
Or, even a generator expression
(i.some_attribute for i in items)
So ...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘i...
...
return fabs(a-b);
}
}
int main()
{
foo::distance(x,y); //now you're calling your own distance function.
}
或者不使用命名空间std,显式声明std::vector也可以解决。
error 显示调用
date(): It is not safe to rely on the system\'s timezone settings.解决...
...ely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone.(2)
It is not safe to rely on the system解决方法,其实就是时区设置不正确造成的,本文提供了3种方法来解决这个问题。
实际上，从...