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In C++, what is a virtual base class?

...ve happened to any symbol (e.g. typedef, member variable, member function, cast to the base class, etc.). This really is a multiple inheritance issue, an issue that users should be aware to use multiple inheritance correctly, instead of going the Java way and conclude "Multiple inheritance is 100% e...
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How to convert array to SimpleXML

... @wout Good catch. Added. I did an int cast check instead of is_numeric because is_numeric can give some, although technically expected, results that would really throw you off. – Francis Lewis Jun 21 '17 at 21:51 ...
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How do I unit test web api action method when it returns IHttpActionResult?

... Time to resurrect a dead question The current answers all rely on casting the response object to a known type. Unfortunately, the responses do not seem to have a useable hierarchy or implicit conversion path for this to work without intimate knowledge of the controller implementation. Consi...
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Resolving ambiguous overload on function pointer and std::function for a lambda using +

... (see discussion in the comments). Still, I'd recommend using an explicit cast to the function pointer type if you want to avoid the ambiguity: you don't need to ask on SO what is does and why it works ;) share | ...
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Why should I use var instead of a type? [duplicate]

...ype of the variable crystal clear on the RHS of the assignment (e.g. via a cast or a constructor call), where's the benefit of also having it on the LHS? It's a personal preference though. If you don't want R# suggesting the use of var, just change the options. One thing about ReSharper: it's very ...
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Add and Remove Views in Android Dynamically?

...ViewParents in general can't remove views, but ViewGroups can. You need to cast your parent to a ViewGroup (if it is a ViewGroup) to accomplish what you want. For example: View namebar = View.findViewById(R.id.namebar); ((ViewGroup) namebar.getParent()).removeView(namebar); Note that all Layout...
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Should the hash code of null always be zero, in .NET

...riteLine((int)v); it return 0, as expected, or simple Spring if we avoid casting to int. So.. if you do the following: Season? v = Season.Spring; Season? vnull = null; if(vnull == v) // never TRUE EDIT From MSDN If two objects compare as equal, the GetHashCode method for each object m...
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get list from pandas dataframe column

...then call x.tolist() on to turn them into a Python list. Alternatively you cast it with list(x). import pandas as pd data_dict = {'one': pd.Series([1, 2, 3], index=['a', 'b', 'c']), 'two': pd.Series([1, 2, 3, 4], index=['a', 'b', 'c', 'd'])} df = pd.DataFrame(data_dict) print(f"DataF...
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MySQL Results as comma separated list

...in and want to output a comma-delimited list to the page, use GROUP_CONCAT(CAST(s.name AS CHAR)) or else it will just return something wholly unuseful like [BLOB - 20 Bytes]. – devios1 Mar 1 '12 at 15:52 ...
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Using current time in UTC as default value in PostgreSQL

...now()::timestamp If your other timestamp are without time zone then this cast will yield the matching type "timestamp without time zone" for the current time. I would like to read what others think about that option, though. I still don't trust in my understanding of this "with/without" time zone...