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How to split a column into two columns?
...s is (NaN) which will result in ValueError (to overcome this issue you can cast it to string type before splitting). I recommend you to try it on your own it's the best way of learning :-)
– Nerxis
Dec 18 '19 at 8:07
...
How should I use try-with-resources with JDBC?
.... params) throws SQLException {
stat.setLong(1, Long.class.cast(params[0]));
stat.setString(2, String.valueOf(params[1]));
}
};
ResultSet rs = stat.executeQuery();) {
while (rs.next())
System.out.println(String.format("%s, %s", ...
What is the point of the diamond operator () in Java 7?
... all specific features and have only the Object features except when you'd cast the retrieved object to it's original type which can sometimes be very tricky and result in a ClassCastException.
Using List<String> list = new LinkedList() will get you rawtype warnings.
...
C++ static virtual members?
...ely type-safe and doesn't contain any black magic like typeid's or dynamic_cast's :)
So, we want to provide only one definition of getTypeInformation() per derived class and it is obvious that it has to be a definition of static function because it is not possible to call "SomeDerivedClass::getType...
What is the result of % in Python?
...erator, so watch out if you are coming from a language with automatic type casting (like PHP or JS) where an expression like '12' % 2 + 3 is legal: in Python it will result in TypeError: not all arguments converted during string formatting which probably will be pretty confusing for you.
[update for...
Why use double indirection? or Why use pointers to pointers?
...
No (!) need to cast the result of malloc in C.
– alk
Apr 16 '19 at 16:50
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Handling warning for possible multiple enumeration of IEnumerable
...ToReadOnly<T>(this IList<T> list) extension method that simple casts if the underlying type supports both interfaces, but you have to add it manually everywhere when refactoring, where as IEnumerable<T> is always compatible.)
As always this is not an absolute, if you're writing da...
Any equivalent to .= for adding to beginning of string in PHP?
...ltiple languages. sprintf has its place and purpose on when to use it. eg. casting of multiple values or enforcing a number of inputs using sprintf, provides you with more functionality than simple concatenation when is required. See: 3v4l.org/8PWil But it should be not be used as a complete replace...
Passing two command parameters using a WPF binding
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Use Tuple in Converter, and in OnExecute, cast the parameter object back to Tuple.
public class YourConverter : IMultiValueConverter
{
public object Convert(object[] values, ...)
{
Tuple<string, string> tuple = new Tuple<strin...
List comprehension on a nested list?
...t comprehension in this case. This is also applicable if you are trying to cast to either int or str. For small number of lists with less elements per list, the difference is negligible. For larger lists with more elements per list one might like to use map instead of list comprehension, but it tot...