大约有 38,000 项符合查询结果（耗时：0.0622秒） [XML]
Error: could not find function … in R
...hat function available in R 3.3.1. See also github.com/r-lib/backports for more info. I've added some info for that case, thx for notifying
– Joris Meys
Mar 12 '18 at 19:30
...
How do I delete multiple rows in Entity Framework (without foreach)
...
|
show 5 more comments
74
...
What is in your Mathematica tool bag? [closed]
...
|
show 3 more comments
57
...
Differences between distribute, distutils, setuptools and distutils2?
...s merged back into Setuptools 0.7, so you don't need to use Distribute any more. In fact, the version on Pypi is just a compatibility layer that installs Setuptools.
distutils2 was an attempt to take the best of distutils, setuptools and distribute and become the standard tool included in Python's s...
Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
...
|
show 8 more comments
346
...
Using Case/Switch and GetType to determine the object [duplicate]
...
IDictionary is a fine solution in my opinion. If it's more than one or two types to test, I'd usually use that. Well, or just use polymorphism in the first place to avoid switching on types.
– OregonGhost
Apr 2 '09 at 9:12
...
How to handle exceptions in a list comprehensions?
...a list comprehension is an expression containing other expression, nothing more (i.e., no statements, and only statements can catch/ignore/handle exceptions).
Function calls are expression, and the function bodies can include all the statements you want, so delegating the evaluation of the exceptio...
Using port number in Windows host file
...
|
show 5 more comments
167
...
No serializer found for class org.hibernate.proxy.pojo.javassist.Javassist?
...
|
show 6 more comments
84
...
Pointer to pointer clarification
...(Technically I should say "lvalue" instead of "variable", but I feel it is more clear to describe mutable storage locations as "variables".)
So we have variables:
int i = 5, j = 6;
int *ip1 = &i, *ip2 = &j;
Variable ip1 contains a pointer. The & operator turns i into a pointer and th...