大约有 42,000 项符合查询结果（耗时：0.0619秒） [XML]
Difference between malloc and calloc?
...tage of the OS's guarantee.
This means calloc memory can still be "clean" and lazily-allocated, and copy-on-write mapped to a system-wide shared physical page of zeros. (Assuming a system with virtual memory.)
Some compilers even can optimize malloc + memset(0) into calloc for you, but you should...
What is the effect of extern “C” in C++?
...then link to using the C name.
Since C++ has overloading of function names and C does not, the C++ compiler cannot just use the function name as a unique id to link to, so it mangles the name by adding information about the arguments. A C compiler does not need to mangle the name since you can not ...
Singular or plural controller and helper names in Rails
Is there any disadvantage to using singular names for controllers and helpers? Nothing seems to rely on this. It even seems helpers don't have to make the same choice about singular vs. plural as their corresponding controllers, at least according to my limited experimentation. Is that true?
...
python: how to identify if a variable is an array or a scalar
...supports a tuple of classes, check type(x) in (..., ...) should be avoided and is unnecessary.
You may also wanna check not isinstance(x, (str, unicode))
share
|
improve this answer
|
...
How to calculate moving average without keeping the count and data-total?
...d a way to calculate a moving cumulative average without storing the count and total data that is received so far.
8 Answer...
Why doesn't Internet Explorer 11 honour conditional comments even when emulating Internet Explorer 8
...ditional comments are still ignored, that is, they are not properly parsed and behave like normal comments. So any referenced file inside the conditional comment is not requested/loaded by the browser.
...
Python List vs. Array - when to use?
...y, you can implement it as a List, or else use the 'array' module in the standard library. I have always used Lists for 1d arrays.
...
log4j logging hierarchy order
... you will see how the log works in each level. i.e for WARN, (FATAL, ERROR and WARN) will be visible. For OFF, nothing will be visible.
share
|
improve this answer
|
follow
...
What is the Git equivalent for revision number?
...r my personal projects I decided to use Git. So I installed Git yesterday, and I wonder what is the revision number equivalent in Git .
...
Ignoring time zones altogether in Rails and PostgreSQL
I'm dealing with dates and times in Rails and Postgres and running into this issue:
2 Answers
...