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Which is faster: Stack allocation or Heap allocation
...pty classes take up 1 byte of space, minimum
}
int main()
{
std::clock_t start = std::clock();
for (int i = 0; i < 100000; ++i)
empty e;
std::clock_t duration = std::clock() - start;
std::cout << "stack allocation took " << duration << " clock ticks\n";
...
How to get current moment in ISO 8601 format with date, hour, and minute?
...ad safe.
ZonedDateTime.now( ZoneOffset.UTC ).format( DateTimeFormatter.ISO_INSTANT )
Result: 2015-04-14T11:07:36.639Z
You may be tempted to use lighter Temporal such as Instant or LocalDateTime,
but they lacks formatter support or time zone data.
Only ZonedDateTime works out of the box.
...
How do you find the row count for all your tables in Postgres
...vy activity, but is generally a good estimate:
SELECT schemaname,relname,n_live_tup
FROM pg_stat_user_tables
ORDER BY n_live_tup DESC;
That can also show you how many rows are dead, which is itself an interesting number to monitor.
The third way is to note that the system ANALYZE command, ...
How to edit log message already committed in Subversion?
...t modify a remote
repository using this command.
$ svnadmin setlog REPOS_PATH -r N FILE
where REPOS_PATH is the repository
location, N is the revision number
whose log message you wish to change,
and FILE is a file containing the new
log message. If the
"pre-revprop-change" hook i...
Android: checkbox listener
... for kotlin satView.setOnCheckedChangeListener { buttonView, _ -> if (buttonView.isChecked) { // perform action } else { // perform action } }
– Aminul Haque Aome
Nov 1...
What's the difference between EscapeUriString and EscapeDataString?
...)*+,;=
For completeness, the unreserved characters are alphanumeric and -._~
Both methods escape characters that are neither reserved nor unreserved.
I disagree with the general notion that EscapeUriString is evil. I think a method that escapes only illegal characters (such as spaces) and not res...
convert double to int
...safe function because it accepts just anything.
– Ant_222
Jul 5 '16 at 14:48
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C/C++中退出线程的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...么决不应该调用ExitThread。应该使用Visual C++运行期库函数_endthreadex。如果不使用Microsoft的Visual C++编译器，你的编译器供应商有它自己的ExitThread的替代函数。不管这个替代函数是什么，都必须使用。
3、TerminateThread函数
调用Te...
Checking network connection
...
Perhaps you could use something like this:
import urllib2
def internet_on():
try:
urllib2.urlopen('http://216.58.192.142', timeout=1)
return True
except urllib2.URLError as err:
return False
Currently, 216.58.192.142 is one of the IP addresses for google.com. ...
How to replace a character by a newline in Vim
...using GVim on Windows, and I need neither the :set magic (it's not in my ~/_vimrc either) or ctrl-q. Just a simple ctrl-v followed by enter creates the ^M character for me just fine.
– Chris Phillips
Sep 14 '11 at 21:02
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