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How to automatically convert strongly typed enum into int?
...automatic or 'silent' as Iammilind puts it. That prevents dificult to find errors. You can still do a cast but you are forced to think about it. That way you know what you're doing. To me it is part of a 'safe coding' habit. I prefer that no conversions are not done automatic is there is a sliver o...
GCC -fPIC option
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Yes, building a shared library that isn't PIC could be an error.
– John Zwinck
Mar 15 '11 at 12:31
94
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Labels for radio buttons in rails form
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this method also renders the field_with_errors div when necessary (that doesn't show up when using the :contactmethod_email method). this is the correct answer!
– caesarsol
Dec 3 '14 at 18:26
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Why is nginx responding to any domain name?
...s run an 'nginx -t' to test the config before restarting - you may have an error preventing a restart.
– jwhitlock
Dec 12 '13 at 21:10
2
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How and where are Annotations used in Java?
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This one is actually built into the Java JDK. The compiler will signal an error, if some method is tagged with it, which does not override a method inherited from a base class. This annotation may be helpful in order to avoid the common mistake, where you actually intend to override a method, but f...
Cannot truncate table because it is being referenced by a FOREIGN KEY constraint?
... I wouldn't suggest going this route, as you might also get this error: The DELETE statement conflicted with the REFERENCE constraint
– sksallaj
May 16 '17 at 17:39
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Django migration strategy for renaming a model and relationship fields
...ions.RenameField('YetAnotherModel', 'foo', 'bar')
]
You may get some errors if you don't update the names where it's imported e.g. admin.py and even older migration files (!).
Update: As ceasaro mentions, newer versions of Django are usually able to detect and ask if a model is renamed. So tr...
Can virtual functions have default parameters?
... B;
A* pa = pb;
pa->f(); //OK, calls pa->B::f(7)
pb->f(); //error: wrong number of arguments for B::f()
}
Here is a sample program to demonstrate what defaults are picked up. I'm using structs here rather than classes simply for brevity -- class and struct are exactly the same i...
Removing fields from struct or hiding them in JSON Response
...ucta interface{},
includeFields map[string]bool) (jsona []byte, status error) {
value := reflect.ValueOf(structa)
typa := reflect.TypeOf(structa)
size := value.NumField()
jsona = append(jsona, '{')
for i := 0; i < size; i++ {
structValue := value.Field(i)
v...
How to change an application icon programmatically in Android?
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Error running app. Default activity not found.
– CopsOnRoad
Oct 15 '17 at 7:20
1
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