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Does java.util.List.isEmpty() check if the list itself is null? [duplicate]
...I deleted my stupid comment, before I saw your answer. Maybe he comes from PHP where we have !empty($foo) as somewhat an alias for isset($foo) && $foo != "".
– Aufziehvogel
Jul 16 '12 at 20:39
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Auto increment in phpmyadmin
I have an existing database using PHP, MySQL and phpMyAdmin.
9 Answers
9
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Getting the last argument passed to a shell script
...=$BASH_ARGV # official built-in (but takes more typing :)
That's it.
$ cat lastarg
#!/bin/bash
# echo the last arg given:
_last=${!#}
echo $_last
_last=$BASH_ARGV
echo $_last
for x; do
echo $x
done
Output is:
$ lastarg 1 2 3 4 "5 6 7"
5 6 7
5 6 7
1
2
3
4
5 6 7
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Accessing @attribute from SimpleXML
...ode. You can then var_dump the return value of the function.
More info at php.net
http://php.net/simplexmlelement.attributes
Example code from that page:
$xml = simplexml_load_string($string);
foreach($xml->foo[0]->attributes() as $a => $b) {
echo $a,'="',$b,"\"\n";
}
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Why do people say that Ruby is slow? [closed]
...me:
Ruby 1.9 vs. Python3 within the same order of magnitude
Ruby 1.9 vs. PHP within the same order of magnitude
Ruby 1.9 vs. Java 6 server up to two orders of magnitude slower!
Ruby 1.9 vs. C (gcc) up to two orders of magnitude slower!
...
Why is Ruby considered slow?
Depends on whom you as...
Sorting arrays in NumPy by column
...
I suppose this works: a[a[:,1].argsort()]
This indicates the second column of a and sort it based on it accordingly.
share
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improve this answer
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fol...
Git repository broken after computer died
...ou to figure out what the master ref should be so you can restore it (i.e. cat the correct SHA1 into .git/refs/heads/master).
In case any object contained in that commit is genuinely corrupted you can't restore your HEAD commit unfortunately. Assuming your working tree and/or index are intact you c...
Display filename before matching line
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If you have the options -H and -n available (man grep is your friend):
$ cat file
foo
bar
foobar
$ grep -H foo file
file:foo
file:foobar
$ grep -Hn foo file
file:1:foo
file:3:foobar
Options:
-H, --with-filename
Print the file name for each match. This is the default when there is
m...
How to programmatically send a 404 response with Express/Node?
...
Nowadays there's a dedicated status function for this on the response object. Just chain it in somewhere before you call send.
res.status(404) // HTTP status 404: NotFound
.send('Not found');
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How to apply shell command to each line of a command output?
... to append a random ID between 1000 and 15000, when SED matches a line. cat /logs/lfa/Modified.trace.log.20150904.pw | sed -r 's/^(.*)(\|006\|00032\|)(.*)$/echo "\1\2\3 - ID `shuf -i 999-14999 -n 1`"/e'
– sgsi
Sep 8 '15 at 21:37
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