I would modify @vault’s answer above slightly (this may be a new feature). It is definitely desirable to refer to the field by a natural name. However instead of overriding the Manager I would simply use the to_field param of ForeignKey: class Country(models.Model): sigla = models.CharField(max_length=5, unique=True) def __unicode__(self): return u’%s’ % self.sigla class City(models.Model): … Read more
(C)a.foo() is equivalent to (C)(a.foo()), i.e. #2 in the question. To get #1, you would have to write ((C)a).foo(). The Java language specification does not specify operator precedence in a nice, easy-to-read summary. Appendix A of Introduction to Programming in Java by Sedgewick and Wayne has a comprehensive table of operator precedence. Appendix B of … Read more
I had the same problem: since Android 8.0+ some parts of my app did’t change their language anymore. Updating of both application and activity context helps me. Here is an example of MainActivity function: private void setApplicationLanguage(String newLanguage) { Resources activityRes = getResources(); Configuration activityConf = activityRes.getConfiguration(); Locale newLocale = new Locale(newLanguage); activityConf.setLocale(newLocale); activityRes.updateConfiguration(activityConf, activityRes.getDisplayMetrics()); … Read more
You can find the stored definition with the below (remember to adjust the column and table name to find to be ones relevant to your environment!) SELECT object_definition(default_object_id) AS definition FROM sys.columns WHERE name=”colname” AND object_id = object_id(‘dbo.tablename’)
The default value of int is 0 and that is the value it will have in both JavaSE and JavaEE unless it was assigned with another value. You can’t have an uninitialized int class member in Java (or any other primitive). In your example you show the int is a class member, in the other … Read more
This 18 is known as an integer literal. There are all sorts of literals, floating point, String, character, etc. In the following, byte b = 3; the literal 3 is an integer literal. It’s also a constant expression. And since Java can tell that 3 fits in a byte, it can safely apply a narrowing … Read more
It’s a new feature in Java 8 which allows an interface to provide an implementation. Described in Java 8 JLS-13.5.6. Interface Method Declarations which reads (in part) Adding a default method, or changing a method from abstract to default, does not break compatibility with pre-existing binaries, but may cause an IncompatibleClassChangeError if a pre-existing binary … Read more
I did an extensive research on that and starting from 2.2 there is no way to do that. The only way is using some hacking that toddler lock app does but this app put samsung phones recently in the infinite loop, so it is a risky approach. if you look at the froyo source code … Read more
const is like let, it is a LexicalDeclaration (VariableStatement, Declaration) used to define an identifier in your block. You are trying to mix this with the default keyword, which expects a HoistableDeclaration, ClassDeclaration or AssignmentExpression to follow it. Therefore it is a SyntaxError. If you want to const something you need to provide the identifier … Read more
There’s really only two possibilities: null for reference types and new myType() for value types (which corresponds to 0 for int, float, etc) So you really only need to account for two cases: object GetDefaultValue(Type t) { if (t.IsValueType) return Activator.CreateInstance(t); return null; } (Because value types always have a default constructor, that call to … Read more