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Android Fragment handle back button press [duplicate]
... of your FragmentTransaction:
FragmentTransaction tx = fragmentManager.beginTransation();
tx.replace( R.id.fragment, new MyFragment() ).addToBackStack( "tag" ).commit();
If you require more detailed control (i.e. when some Fragments are visible, you want to suppress the back key) you can set an O...
How do I trim a file extension from a String in Java?
...ath had a directory with a . in the name, the one-liner method was tricked into giving part of the path as the filename, which is not correct.
Need for checks
Inspired by skaffman's answer, I took a look at the FilenameUtils.removeExtension method of the Apache Commons IO.
In order to recreate it...
What actually causes a Stack Overflow error? [duplicate]
...fer overflow exception in native programs, when there is a risk of writing into memory that had not been allocated for the buffer, and thus to corrupt some other memory locations. It's not the case at all.
JVM has a given memory allocated for each stack of each thread, and if an attempt to call a m...
differentiate null=True, blank=True in django
...y string ('').
A few examples:
models.DateTimeField(blank=True) # raises IntegrityError if blank
models.DateTimeField(null=True) # NULL allowed, but must be filled out in a form
Obviously, Those two options don't make logical sense to use (though there might be a use case for null=True, blank=F...
std::shared_ptr thread safety explained
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As others have pointed out, you've got it figured out correctly regarding your original 3 questions.
But the ending part of your edit
Calling reset() in thread IV will delete previous instance of A class created in first thread and replace i...
How should I use try-with-resources with JDBC?
...don't have to refer to a separate method:
public List<User> getUser(int userId) {
String sql = "SELECT id, username FROM users WHERE id = ?";
List<User> users = new ArrayList<>();
try (Connection con = DriverManager.getConnection(myConnectionURL);
PreparedStat...
Setting the zoom level for a MKMapView
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Interestingly, MKCoordinateRegionMakeWithDistance is still around in Swift. This solution works!
– LinusGeffarth
Feb 4 '19 at 10:53
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A generic list of anonymous class
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It does seem an inconsistency in Visual Studio, that intellisense isn't more helpful in uncovering missing includes of assemblies with referenced extension methods (same as referenced types).
– LOAS
Jan 4 '12 at 12:21
...
How to read and write INI file with Python3?
...nfigparser
config = configparser.ConfigParser()
config.read('FILE.INI')
print(config['DEFAULT']['path']) # -> "/path/name/"
config['DEFAULT']['path'] = '/var/shared/' # update
config['DEFAULT']['default_message'] = 'Hey! help me!!' # create
with open('FILE.INI', 'w') as configfile: ...
Ship an application with a database
...ase in the assets folder with the new database, saving the old database in internal storage under another name, copying the new database from the assets folder into internal storage, transferring all of the data from the old database (that was renamed earlier) into the new database and finally delet...