大约有 3,516 项符合查询结果（耗时：0.0088秒） [XML]
Is it possible to capture a Ctrl+C signal and run a cleanup function, in a “defer” fashion?
...han os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func(){
for sig := range c {
// sig is a ^C, handle it
}
}()
The manner in which you cause your program to terminate and print information is entirely up to you.
...
Getting the index of the returned max or min item using max()/min() on a list
...mgetter() presented in the other answers, and use instead
index_min = min(range(len(values)), key=values.__getitem__)
because it doesn't require to import operator nor to use enumerate, and it is always faster(benchmark below) than a solution using itemgetter().
If you are dealing with numpy arr...
if/else in a list comprehension
...ative example:
>>> print(", ".join(["ha" if i else "Ha" for i in range(3)]) + "!")
Ha, ha, ha!
It exploits the fact that if i evaluates to False for 0 and to True for all other values generated by the function range(). Therefore the list comprehension evaluates as follows:
>>> ...
git: Apply changes introduced by commit in one repo to another repo
... repository.
With modern Git you can use multiple revisions and revision ranges with cherry-pick.
The $(git --git-dir=../repo/.git rev-parse --verify <commit>)
is here to translate <commit> (for example HEAD, or v0.2, or master~2, which are values in the second repository you copy fro...
What does the keyword Set actually do in VBA?
...analogy. Take this example (VBA on the left | C on the right): Dim A, B As Range | Range A, B;. Going with your analogy, A = B | A = B; would be correct (and it would be in C), but Set A = B | A = &B; is actually correct in VBA (and it would fail in C). In VBA, A = B and Set A = B are BOTH equi...
How does zip(*[iter(s)]*n) work in Python?
...e = 3
L = [1,2,3,4,5,6,7,8,9]
# iterate over L in steps of 3
for start in range(0,len(L),chunk_size): # xrange() in 2.x; range() in 3.x
end = start + chunk_size
print L[start:end] # three-item chunks
Following the values of start and end:
[0:3) #[1,2,3]
[3:6) #[4,5,6]
[6:9) #[7,8,9]
...
Saving a Numpy array as an image
...
Remember to scale the values to the right range for PNG, usually 0..255. The value ranges in neural networks are frequently 0..1 or -1..1.
– Tomáš Gavenčiak
Mar 31 '18 at 18:49
...
How to add extra info to copied web text
...ection + pagelink,
newdiv = document.createElement('div');
var range = selection.getRangeAt(0); // edited according to @Vokiel's comment
//hide the newly created container
newdiv.style.position = 'absolute';
newdiv.style.left = '-99999px';
//insert the container, fill i...
How do I remove an item from a stl vector with a certain value?
...repeat the vector name 4 times) would be to use Boost:
#include <boost/range/algorithm_ext/erase.hpp>
// ...
boost::remove_erase(vec, int_to_remove);
See http://www.boost.org/doc/libs/1_64_0/libs/range/doc/html/range/reference/algorithms/new/remove_erase.html
...
Random number generation in C++11: how to generate, how does it work? [closed]
...(think of this as the classic rand()). Now you want a random number in the range 0, 1, 2, each with equal probability. Your knee-jerk reaction would be to take rand() % 3. But wait, the remainders 0 and 1 occur more often than the remainder 2, so this isn't correct!
This is why we need proper distr...