大约有 40,000 项符合查询结果（耗时：0.0298秒） [XML]
insert vs emplace vs operator[] in c++ map
...s.
b. See what happens when you use some other container class (e.g. std::set or std::unordered_multiset) instead of std::unordered_map.
c. Now use a Goo object (just a renamed copy of Foo) instead of an int as the range type in an unordered_map (i.e. use unordered_map<Foo, Goo> instead of u...
Multiple working directories with Git?
...est-next is already taken).
Within a linked working tree:
$GIT_DIR is set to point to this private directory (e.g. /path/main/.git/worktrees/test-next in the example) and
$GIT_COMMON_DIR is set to point back to the main working tree's $GIT_DIR (e.g. /path/main/.git).
These settings are mad...
Return first N key:value pairs from dict
Consider the following dictionary, d:
18 Answers
18
...
changing source on html5 video tag
...ementById('video');
var source = document.createElement('source');
source.setAttribute('src', 'http://www.tools4movies.com/trailers/1012/Kill%20Bill%20Vol.3.mp4');
video.appendChild(source);
video.play();
setTimeout(function() {
video.pause();
source.setAttribute('src', 'http://www.too...
Immutable vs Mutable types
...bers: int(), float(), complex()
immutable sequences: str(), tuple(), frozenset(), bytes()
Common mutable type (almost everything else):
mutable sequences: list(), bytearray()
set type: set()
mapping type: dict()
classes, class instances
etc.
One trick to quickly test if a type is mutable or no...
How to get the caller's method name in the called method?
...
inspect.getframeinfo and other related functions in inspect can help:
>>> import inspect
>>> def f1(): f2()
...
>>> def f2():
... curframe = inspect.currentframe()
... calframe = inspect.getouterframes(c...
How to use clock() in C++
...::clock() - start ) / (double) CLOCKS_PER_SEC;
std::cout<<"printf: "<< duration <<'\n';
}
share
|
improve this answer
|
follow
|
...
Command line for looking at specific port
Is there a way to examine the status of a specific port from the Windows command line? I know I can use netstat to examine all ports but netstat is slow and looking at a specific port probably isn't.
...
What is a C++ delegate?
...
#include <functional>
std::function<int(double)> f = [can be set to about anything in this answer]
// Usually more useful as a parameter to another functions
Option 6: binding (using std::bind)
Allows setting some parameters in advance, convenient to call a member function for ins...
Python matplotlib multiple bars
...als = [11,12,13]
rects3 = ax.bar(ind+width*2, kvals, width, color='b')
ax.set_ylabel('Scores')
ax.set_xticks(ind+width)
ax.set_xticklabels( ('2011-Jan-4', '2011-Jan-5', '2011-Jan-6') )
ax.legend( (rects1[0], rects2[0], rects3[0]), ('y', 'z', 'k') )
def autolabel(rects):
for rect in rects:
...