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How can I clear an HTML file input with JavaScript?
...Unfortunately none of the above answers appear to cover all the bases - at least not with my testing with vanilla javascript.
.value = null appears to work on FireFox, Chome, Opera and IE11 (but not IE8/9/10)
.cloneNode (and .clone() in jQuery) on FireFox appears to copy the .value over, therefor...
What is the string concatenation operator in Oracle?
...
CONCAT is also compatible with other DBMSes (at least MySQL and Postgres).
– lapo
Oct 13 '15 at 15:07
1
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A fast method to round a double to a 32-bit int explained
...arded anyway, since we are taking only its lowest 32 bits.
Last but not least: the sign.
IEEE 754 floating point uses a magnitude and sign representation, while integers on "normal" machines use 2's complement arithmetic; how is this handled here?
We talked only about positive integers; now sup...
How do I disable a Pylint warning?
...erMixIn class. When running pylint with the argument --disable-ids=... (at least without a config file), this dictionary is initially empty, raising a KeyError exception within pylint (pylint.utils.MessagesHandlerMixIn.check_message_id().
In Eclipse, you can see this error-message in the Pylint Cons...
to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
... an image from the GPU, changing it, then uploading the whole image (or at least a comparatively large chunk of it) back to the GPU is rather slow. Also, the actual drawing that Quartz does, while really fast for what you are doing, is way slower than what the GPU does.
That's obvious, considering ...
Enabling ProGuard in Eclipse for Android
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As of ADT 16 at least, you can indeed add the line in project.properties, and it will be preserved. You can try changing the target SDK version, and see that project.properties is updated accordingly but the added line is still there. So, I ...
What is the difference between the Eclipse Package Explorer and the Eclipse Project Explorer?
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One thing I just noticed is that, at least when developing Java Android apps, Projects will not show up in the Package Explorer if their project.properties file is borked or non-existent.
I had only been using the Package Explorer and had the Project Explorer h...
What is the difference between lower bound and tight bound?
...nd lower bound).
For example, an algorithm taking Omega(n log n) takes at least n log n time, but has no upper limit. An algorithm taking Theta(n log n) is far preferential since it takes at least n log n (Omega n log n) and no more than n log n (Big O n log n).
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Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...u?
With regards to msgpack vs bson vs protocol buffers... msgpack is the least bytes of the group, protocol buffers being about the same. BSON defines more broad native types than the other two, and may be a better match to your object mode, but this makes it more verbose. Protocol buffers have ...
how to release localhost from Error: listen EADDRINUSE
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On Linux (Ubuntu derivatives at least)
killall node
is easier than this form.
ps | grep <something>
kill <somepid>
Neither will work if you have a orphaned child holding the port. Instead, do this:
netstat -punta | grep <port>
If ...