大约有 30,000 项符合查询结果（耗时：0.0311秒） [XML]
IEnumerable to string [duplicate]
...egate(new StringBuilder(), (seed, c) => seed.Append(c)).ToString();
I timed this using the same tests that Jeff Mercado used and this was 1 second slower across 1,000,000 iterations on the same 300 character sequence (32-bit release build) than the more explicit:
static string StringBuilderCha...
Erlang's 99.9999999% (nine nines) reliability
...ported to have been used in production systems for over 20 years with an uptime percentage of 99.9999999%.
4 Answers
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Faster s3 bucket duplication
...
It supports non-concurrent sync based on file modified time, size, etc. It was blazing fast when I tried it. I believe the objects are copied directly on S3 without downloading them to the local machine. It doesn't run in parallel by default but I'm sure you could have multiple s...
boundingRectWithSize for NSAttributedString returning wrong size
...
Attention! It does not always work! Sometimes the returned width is larger than the width of the size parameter. Even Apples method documentation states: "The constraints you specify in the size parameter are a guide for the renderer for how to size the string. How...
Event system in Python
...andlers on the actual Event
object (or handlers list). So at registration time the event already needs to exist.
That's why the second style of event systems exists: the
publish-subscribe pattern.
Here, the handlers don't register on an event object (or handler list), but on a central dispatcher.
A...
Variable number of arguments in C++?
... but with the advantages to:
be strongly type safe;
work without the run-time information of the number of arguments, or without the usage of a "stop" argument.
Here is an example for mixed argument types
template<class... Args>
void print(Args... args)
{
(std::cout << ... <&...
How to verify if a file exists in a batch file?
... If no date is given, copies only those files whose
source time is newer than the destination time.
/H Copies hidden and system files also.
/E Copies directories and subdirectories, including empty ones.
Same as /S /E. May be used to modify /T.
...
Getting HTTP code in PHP using curl
...ck to check server side. For example, doing this first could save a lot of time:
if(!$url || !is_string($url) || ! preg_match('/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i', $url)){
return false;
}
Make sure you only fetch the headers, not the body content:
@curl_setopt($ch, C...
is node.js' console.log asynchronous?
... and asynchronous when it's a pipe (to avoid blocking for long periods of time).
That is, in the following example, stdout is non-blocking while stderr is blocking:
$ node script.js 2> error.log | tee info.log
In daily use, the blocking/non-blocking dichotomy is not something you shou...
Perforce for Git users? [closed]
...ork with one or two repositories. With Perforce you need to spend a bit of time picking and choosing the bits of code you want.
Many Perforce shops use streams which can automatically generate a workspace view, or they generate the view using scripts or template workspaces. Equally many leave their...