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Groovy Shell warning “Could not open/create prefs root node …”
...o a backport for Java8 which is in u202.
What you see is really a warning from the JDK's internal logger. It is not an exception. I believe that the warning can be safely ignored .... unless the user code is indeed wanting the system preferences, but that is very rarely the case.
Bonus info
The ...
How to get the last element of an array in Ruby?
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Use -1 index (negative indices count backward from the end of the array):
a[-1] # => 5
b[-1] # => 6
or Array#last method:
a.last # => 5
b.last # => 6
share
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Maximum call stack size exceeded error
...error. Actually the JS file is not my own creation, but is a library file (from DWR engine.js)..directwebremoting.org Also when you say "debugger to check the call stack ", how do I do that using the Safari Inspector?
– testndtv
May 23 '11 at 9:58
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Best way to check if a URL is valid
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<?php
$url = "http://www.qbaki.com";
// Remove all illegal characters from a url
$url = filter_var($url, FILTER_SANITIZE_URL);
// Validate url
if (filter_var($url, FILTER_VALIDATE_URL) !== false) {
echo("$url is a valid URL");
} else {
echo("$url is not a valid URL");
}
?>
Possible flags...
Check if directory mounted with bash
...ing the mount command without arguments will tell you the current mounts. From a shell script, you can check for the mount point with grep and an if-statement:
if mount | grep /mnt/md0 > /dev/null; then
echo "yay"
else
echo "nay"
fi
In my example, the if-statement is checking the exit...
Textarea Auto height [duplicate]
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If you add some additional height it will stop the text from scrolling for the split second before the element is resized. (element.scrollHeight+20)+"px";
– Nicholas
Sep 21 '15 at 6:40
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How do you test running time of VBA code?
...wer below gives the same thing in one line of code (importing GetTickCount from kernel32).
– BrainSlugs83
Mar 8 '14 at 0:45
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What should I do if two libraries provide a function with the same name generating a conflict?
... - lest someone else came along, trying to load the thing again. You'd go from one conflict to dozens or hundreds. =] I love this about stackoverflow: we have a tested answer to a question and it has 3 votes. The first (incomplete) answer: 17. =]
– Sniggerfardimungus
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PHP DOMDocument errors/warnings on html5-tags
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You can filter the errors you get from the parser. As per other answers here, turn off error reporting to the screen, and then iterate through the errors and only show the ones you want:
libxml_use_internal_errors(TRUE);
// Do your load here
$errors = libxml...
Difference between StringBuilder and StringBuffer
...thods in a single thread is overkill.
That's pretty much about it.
Quote from StringBuilder API:
This class [StringBuilder] provides an API compatible with StringBuffer, but with no guarantee of synchronization. This class is designed for use as a drop-in replacement for StringBuffer in places...