大约有 13,350 项符合查询结果（耗时：0.0221秒） [XML]
Why would I ever use push_back instead of emplace_back?
C++11 vectors have the new function emplace_back . Unlike push_back , which relies on compiler optimizations to avoid copies, emplace_back uses perfect forwarding to send the arguments directly to the constructor to create an object in-place. It seems to me that emplace_back does everything p...
What's the point of map in Haskell, when there is fmap?
... the GHC.Base source code, the map function is implemented as follows
map _ [] = []
map f (x:xs) = f x : map f xs
which makes use of pattern matching to pull the head (the x) off the tail (the xs) of the list, then constructs a new list by using the : (cons) value constructor so to prepend f ...
Check if at least two out of three booleans are true
...he following on my machine (running Ubuntu on Intel Core 2 + sun java 1.6.0_15-b03 with HotSpot Server VM (14.1-b02, mixed mode)):
First and second iterations:
a&&b || b&&c || a&&c : 1740 ms
a ? b||c : b&&c : 1690 ms
a&b | b&c | c&a : 835 ms
...
Streaming a video file to an html5 video player with Node.js so that the video controls continue to
....mp4" controls></video>');
} else {
var file = path.resolve(__dirname,"movie.mp4");
fs.stat(file, function(err, stats) {
if (err) {
if (err.code === 'ENOENT') {
// 404 Error if file not found
return res.sendStatus(404);
}
res.end(err...
Which @NotNull Java annotation should I use?
...verview:
FIELD METHOD PARAMETER LOCAL_VARIABLE
android.support.annotation X X X
edu.umd.cs.findbugs.annotations X X X X
org.jetbrains.annotation X X X X
lombok X X...
Convert .pem to .crt and .key
... unable to load certificate 140584440387400:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFICATE
– Damien Carol
May 20 '15 at 13:57
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How do I use arrays in C++?
...th of those ingredients differ, you get a distinct type:
#include <type_traits>
static_assert(!std::is_same<int[8], float[8]>::value, "distinct element type");
static_assert(!std::is_same<int[8], int[9]>::value, "distinct size");
Note that the size is part of the type, that i...
How to change the default charset of a MySQL table?
...lumns to a new character set, use a statement like this:
ALTER TABLE tbl_name CONVERT TO CHARACTER SET charset_name;
So query will be:
ALTER TABLE etape_prospection CONVERT TO CHARACTER SET utf8;
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Conditions for automatic generation of default/copy/move ctor and copy/move assignment operator?
...t copy won't modify it's target but move does?
– RaGa__M
Jul 5 '17 at 7:47
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Composer: how can I install another dependency without updating old ones?
...which I ask) when I ask just update one package.
– OZ_
Oct 27 '14 at 9:38
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