大约有 20,000 项符合查询结果（耗时：0.0349秒） [XML]
What CSS selector can be used to select the first div within another div
...
Just ran a test, indeed it works if doctype is specified. In my defence, I wouldn't be surprised if stuff started working in IE if you'd type <the_cake_is_a_lie> at the top of the file ...
– Valentin Flachsel...
Iterate over object attributes in python
...t; yc = YourClass()
>>> yc.one = range(15)
>>> yc.two = 'test'
>>> dict(yc)
{'one': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14], 'two': 'test'}
share
|
improve thi...
How to write loop in a Makefile?
...pe platform.
for number in 1 2 3 4 ; do \
./a.out $$number ; \
done
Test as follows:
target:
for number in 1 2 3 4 ; do \
echo $$number ; \
done
produces:
1
2
3
4
For bigger ranges, use:
target:
number=1 ; while [[ $$number -le 10 ]] ; do \
echo $$number ; \...
How to retrieve an element from a set without removing it?
...formance might be important). As already shown by the other answers the fastest way is ForLoop.
However as long as one of the constant time approaches is used the performance difference will be negligible.
iteration_utilities (Disclaimer: I'm the author) contains a convenience function for this ...
Check if object is file-like in Python
... explicitly. The whole EAFP, duck typing thing is not some bullshit purity test. It's an actual egineering decision,
– drxzcl
Jan 21 '18 at 19:29
1
...
Check for column name in a SqlDataReader object
...the way back in 2006. stackoverflow.com/a/891230/852208. Further without testing, it's possible that this code is actually slower with it's average case checking half of all columns (though still trivial in a db connected app). I would edit this answer to only include the middle paragraph as the ...
Pass Nothing from Javascript to VBScript in IE9
...on getting a better job!)
I don't have access to IE right now, so I can't test this, but what if you tried writing a function like this:
<script type="text/vbscript">
Function CallWithNulls(fn, arg1, arg2, arg3)
If (isNull(arg1)) arg1 = Nothing
If (isNull(arg2)) arg2 = Nothing
...
Git command to show which specific files are ignored by .gitignore
...called 'exclude'), I find a command line that could help you:
F:\prog\git\test\.git\info>type exclude
# git ls-files --others --exclude-from=.git/info/exclude
# Lines that start with '#' are comments.
# For a project mostly in C, the following would be a good set of
# exclude patterns (uncomment...
Can virtual functions have default parameters?
...oo(int i = 2) { cout << "B::foo" << i << endl; }
};
void test() {
A a;
B b;
A* ap = &b;
a.foo();
b.foo();
ap->foo();
}
you should get
A::foo1
B::foo2
B::foo1
share
|
...
Replacing NAs with latest non-NA value
...l the other entries here. For the basic set of features, tidyr::fill is fastest while also not failing the edge cases. The Rcpp entry by @BrandonBertelsen is faster still, but it's inflexible regarding the input's type (he tested edge cases incorrectly due to a misunderstanding of all.equal).
If yo...