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Generate random 5 characters string
...cdefghijklmnopqrstuvwxyz";
$base = strlen($charset);
$result = '';
$now = explode(' ', microtime())[1];
while ($now >= $base){
$i = $now % $base;
$result = $charset[$i] . $result;
$now /= $base;
}
return substr($result, -5);
}
Note: incremental means easier to guess; If...
MySQL selecting yesterday's date
...
SELECT SUBDATE(NOW(),1);
where now() function returs current date and time of system in Timestamp...
you can use:
SELECT SUBDATE(CURDATE(),1)
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Is there any downside for using a leading double slash to inherit the protocol in a URL? i.e. src=“/
...ink it is safe to say that pretty much all major browsers do support it by now. But the only way to know for sure is to simply try it yourself and see what happens.
– Remy Lebeau
Jan 12 '11 at 23:29
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When to use volatile with multi threading?
...e semantics on volatile variables.
[Update for C++11]
The C++11 Standard now does acknowledge multithreading directly in the memory model and the lanuage, and it provides library facilities to deal with it in a platform-independant way. However the semantics of volatile still have not changed. v...
How can I pad an int with leading zeros when using cout
...th of the field to be printed, and that's it.
If you are interested in knowing how the to format output streams in general, I wrote an answer for another question, hope it is useful:
Formatting C++ Console Output.
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How do you performance test JavaScript code?
...and easy to use, as are console.time(), console.profile(), and performance.now(). Chrome also gives you a timeline view which can show you what is killing your frame rate, where the user might be waiting, etc.
Finding documentation for all these tools is really easy, you don't need an SO answer for...
date format yyyy-MM-ddTHH:mm:ssZ
...Using UTC
ISO 8601 (MSDN datetime formats)
Console.WriteLine(DateTime.UtcNow.ToString("s") + "Z");
2009-11-13T10:39:35Z
The Z is there because
If the time is in UTC, add a 'Z'
directly after the time without a
space. 'Z' is the zone designator for
the zero UTC offset. "09:30 UTC" ...
How to recover stashed uncommitted changes
...oing them in the wrong branch. You just want to take the changes you have now and "move" them to another branch.
This is the easy case, described above. Run git stash save (or plain git stash, same thing). Check out the other branch and use git stash apply. This gets git to merge in your earlie...
Active Record - Find records which were created_at before today
...was referring something like MyTable1.where(MyTable[:created_at] < Time.now) is it possible?
– Sayuj
Nov 2 '11 at 10:05
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My docker container has no internet
I had it working allright but now it stopped. I tried the following commands with no avail:
22 Answers
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