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How can I calculate the difference between two dates?
...ts will always be time-zone-agnostic.
Furthermore, this documentation specifies that Cocoa's implementation of time does not account for leap seconds, so if you require such accuracy, you will need to roll your own implementation.
...
Switching the order of block elements with CSS [duplicate]
...sfiddle.net/thirtydot/hLUHL/
You can remove the -moz- prefixed properties if you like, I just left them in for future readers.
#blockContainer {
display: -webkit-box;
display: -moz-box;
display: box;
-webkit-box-orient: vertical;
-moz-...
Simplest way to wait some asynchronous tasks complete, in Javascript?
...callback) {
conn.collection(name).drop(function(err) {
if (err)
return callback(err);
console.log('dropped');
callback(null, name);
});
}
)});
async.parallel(calls, function(err, result) {
/* this code will run after all ca...
Test if a variable is set in bash when using “set -o nounset”
...
#!/bin/bash
set -o nounset
VALUE=${WHATEVER:-}
if [ ! -z ${VALUE} ];
then echo "yo"
fi
echo "whatever"
In this case, VALUE ends up being an empty string if WHATEVER is not set. We're using the {parameter:-word} expansion, which you can look up in man bash under "Param...
Viewing full output of PS command
...uch as less or most since the output of ps aux is longer than a screenful. If so, the following options will cause (or force) long lines to wrap instead of being truncated.
ps aux | less -+S
ps aux | most -w
If you use either of the following commands, lines won't be wrapped but you can use your...
Is a URL allowed to contain a space?
Is a URI (specifically an HTTP URL) allowed to contain one or more space characters? If a URL must be encoded, is + just a commonly followed convention, or a legitimate alternative?
...
Can't compare naive and aware datetime.now()
...e_start)
challenge.datetime_end = utc.localize(challenge.datetime_end)
# now both the datetime objects are aware, and you can compare them
Note: This would raise a ValueError if tzinfo is already set. If you are not sure about that, just use
start_time = challenge.datetime_start.replace(tzinfo=...
How do I perform HTML decoding/encoding using Python/Django?
...base. It'd be worth looking into getting unescaped results back from BeautifulSoup if possible, and avoiding this process altogether.
With Django, escaping only occurs during template rendering; so to prevent escaping you just tell the templating engine not to escape your string. To do that, use ...
rsync error: failed to set times on “/foo/bar”: Operation not permitted
...
If /foo/bar is on NFS (or possibly some FUSE filesystem), that might be the problem.
Either way, adding -O / --omit-dir-times to your command line will avoid it trying to set modification times on directories.
...
Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?
...
You just saved my life. THANKS.
– Jon Zangitu
Jan 10 '18 at 9:06
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