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Why should I declare a virtual destructor for an abstract class in C++?
....delete]/: ... if the static type of the object to be deleted is different from its dynamic type, ... the static type shall have a virtual destructor or the behavior is undefined. .... It would still be undefined if Derived used an implicitly generated destructor.
– Mankarse
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Python's os.makedirs doesn't understand “~” in my path
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You can now do it like
from srbib import abs_path
my_dir = abs_path('~/path/to/dir')
if not os.path.exists(my_dir):
os.makedirs(my_dir)
Please refer to https://stackoverflow.com/a/54190233/6799074 for usage of srblib.abs_path
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Make the first letter uppercase inside a django template
I am pulling a name from a database which is stored as myname . How do I display this inside a Django template as Myname , with the first letter being in uppercase.
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AngularJS - convert dates in controller
Could anyone please suggest me how to convert date from this 1387843200000 format into this 24/12/2013 inside my controller ?
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How do I initialize a TypeScript object with a JSON object
I receive a JSON object from an AJAX call to a REST server. This object has property names that match my TypeScript class (this is a follow-on to this question ).
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What is the maximum number of characters that nvarchar(MAX) will hold?
...ead for storing the actual length - so I needed to subtract two more bytes from the 2 ^ 31 - 1 length I had previously stipulated - thus you can store 1 Unicode character less than I had claimed before.
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Check if a class has a member function of a given signature
...ou may exploit SFINAE to detect function presence at compile-time. Example from my code (tests if class has member function size_t used_memory() const).
template<typename T>
struct HasUsedMemoryMethod
{
template<typename U, size_t (U::*)() const> struct SFINAE {};
template<ty...
NSString with \n or line break
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I found that when I was reading strings in from a .plist file, occurrences of "\n" were parsed as "\\n". The solution for me was to replace occurrences of "\\n" with "\n". For example, given an instance of NSString named myString read in from my .plist file, I had to ...
Adding a y-axis label to secondary y-axis in matplotlib
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How to get the right y axis like the left one, I mean, from bottom to top, from 0 to 5, aligned.
– Sigur
Mar 22 '18 at 1:43
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How to change a table name using an SQL query?
...luded in the first parameter (that is, this cannot be used to move a table from one schema to another). So, for example, this is valid:
EXEC sp_rename 'myschema.Stu_Table', 'Stu_Table_10'
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