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How can I maintain fragment state when added to the back stack?
...return to FragmentA (by pressing back), a totally new FragmentA is created and the state it was in is lost. I get the feeling I'm after the same thing as this question, but I've included a complete code sample to help root out the issue:
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Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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Better way to shuffle two numpy arrays in unison
...o sequences of the same length results in the same number of calls to the random number generator, and these are the only "random" elements in the shuffle algorithm. By resetting the state, you ensure that the calls to the random number generator will give the same results in the second call to shu...
How to iterate over rows in a DataFrame in Pandas
I have a DataFrame from Pandas:
22 Answers
22
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Which ORM should I use for Node.js and MySQL? [closed]
...le-to-use, reasonable-performance ORM, which supports caching, many-to-one and many-to-many relations.
From the MySQL ORMs I could find, persistencejs and sequelize seem the most mature.
Do you have experience with either? What are the relevant pros and cons I should be aware of in my decision?...
Bash script and /bin/bash^M: bad interpreter: No such file or directory [duplicate]
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I have seen this issue when creating scripts in Windows env and then porting over to run on a Unix environment.
Try running dos2unix on the script:
http://dos2unix.sourceforge.net/
Or just rewrite the script in your Unix env using vi and test.
Unix uses different line endings so ...
Is asynchronous jdbc call possible?
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I don't understand how any of the proposed approaches that wrap JDBC calls in Actors, executors or anything else can help here - can someone clarify.
Surely the basic problem is that the JDBC operations block on socket IO. When it does thi...
What is the difference between exit(0) and exit(1) in C?
Can anyone tell me? What is the difference between exit(0) and exit(1) in C language?
11 Answers
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Xml configuration versus Annotation based configuration [closed]
...efore anyways, so with XML, you would just need to change the XML mappings and it is fairly quick and painless to do so.
I haven't used JPA annotations, so I don't know how good they are, but I would argue that leaving the mapping of beans to the database in XML is also good, as the object shouldn'...
What is the purpose of a self executing function in javascript?
... blocks of JavaScript code.
For example, as mentioned in a comment by Alexander:
(function() {
var foo = 3;
console.log(foo);
})();
console.log(foo);
This will first log 3 and then throw an error on the next console.log because foo is not defined.
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