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How do different retention policies affect my annotations?
Can anyone explain in a clear way the practical differences between the java.lang.annotation.RetentionPolicy constants SOURCE , CLASS , and RUNTIME ?
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How do I get an apk file from an Android device?
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Use adb. With adb pull you can copy files from your device to your system, when the device is attached with USB.
Of course you also need the right permissions to access the directory your file is in. If not, you will need to roo...
How do I create a random alpha-numeric string in C++?
... create a random string, consisting of alpha-numeric characters. I want to be able to be specify the length of the string.
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Why can't strings be mutable in Java and .NET?
Why is it that they decided to make String immutable in Java and .NET (and some other languages)? Why didn't they make it mutable?
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A non-blocking read on a subprocess.PIPE in Python
I'm using the subprocess module to start a subprocess and connect to its output stream (standard output). I want to be able to execute non-blocking reads on its standard output. Is there a way to make .readline non-blocking or to check if there is data on the stream before I invoke .readline ? I'...
Populating spinner directly in the layout xml
Is it possible to populate the options of a Spinner right in the layout xml? This page suggests I should use an ArrayAdapter? It seems awkward not being able to do it..
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What are the differences between Generics in C# and Java… and Templates in C++? [closed]
...ely new. I keep reading that Java made the wrong decision or that .NET has better implementations etc. etc.
13 Answers
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Determine if Android app is being used for the first time
...n the Shared Preferences. Same general idea as checking for an empty file, but then you don't have an empty file floating around, not being used to store anything
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how to convert a string to date in mysql?
... you can do
SELECT STR_TO_DATE(yourdatefield, '%m/%d/%Y')
FROM yourtable
You can also handle these date strings in WHERE clauses. For example
SELECT whatever
FROM yourtable
WHERE STR_TO_DATE(yourdatefield, '%m/%d/%Y') > CURDATE() - INTERVAL 7 DAY
You can handle all kinds of date/tim...
How to get the IP address of the docker host from inside a docker container
As the title says. I need to be able to retrieve the IP address the docker hosts and the portmaps from the host to the container, and doing that inside of the container.
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