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How to free memory in Java?
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Java uses managed memory, so the only way you can allocate memory is by using the new operator, and the only way you can deallocate memory is by relying on the garbage collector.
This memory management whitepaper (PDF) may help explain what's going on.
You can also call Sy...
How can you check which options vim was compiled with?
...e_sysmouse
+mouse_xterm +multi_byte +multi_lang -mzscheme +netbeans_intg -osfiletype
+path_extra -perl +persistent_undo +postscript +printer -profile +python/dyn
-python3 +quickfix +reltime -rightleft +ruby/dyn +scrollbind +signs
+smartindent -sniff +startuptime +statusline -sun_workshop +syntax...
Checking network connection
...t have a working internet connection, the DNS lookup itself may block the call to urllib_request.urlopen for more than a second. Thanks to @rzetterberg for pointing this out.
If the fixed IP address above is not working, you can find a current IP address for google.com (on unix) by running
% dig...
How to use pip with Python 3.x alongside Python 2.x
I installed Python 3.x (besides Python 2.x on Ubuntu) and slowly started to pair modules I use in Python 2.x.
10 Answers
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Using the “animated circle” in an ImageView while loading stuff
...inate="true" />
</RelativeLayout>
And when you finish loading, call this one line:
findViewById(R.id.loadingPanel).setVisibility(View.GONE);
The result (and it spins too):
share
|
i...
Java NIO FileChannel versus FileOutputstream performance / usefulness
...leChannel.transferFrom(). The key advantage here is that the JVM uses the OS's access to DMA (Direct Memory Access), if present. (This is implementation dependent, but modern Sun and IBM versions on general purpose CPUs are good to go.) What happens is the data goes straight to/from disc, to the b...
How to test an Internet connection with bash?
...on't get, just check page availability
$? : shell return code
0 : shell "All OK" code
Without wget
#!/bin/bash
echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1
if [ $? -eq 0 ]; then
echo "Online"
else
echo "Offline"
fi
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How do you beta test an iphone app?
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In year 2011, there's a new service out called "Test Flight", and it addresses this issue directly.
Apple has since bought TestFlight in 2014 and has integrated it into iTunes Connect and App Store Connect.
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What is the simplest and most robust way to get the user's current location on Android?
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Here's what I do:
First of all I check what providers are enabled. Some may be disabled on the device, some may be disabled in application manifest.
If any provider is available I start location listeners and timeout timer. It's 20 seconds in my exampl...
How can I get the console logs from the iOS Simulator?
...X 10.10. those logs are there but my simulator is version 8.1 and the logs all are versions 7.1*
– skift
Dec 4 '14 at 19:30
66
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