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Difference between a virtual function and a pure virtual function [duplicate]
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A pure virtual function is a virtual function whose declaration ends in =0:
class Base {
// ...
virtual void f() = 0;
// ...
A pure virtual function implicitly makes the class it is defined for abstract (unlike in Java where you have a keyword to explicitly declare the class abstract). Ab...
Convert Json Array to normal Java list
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if (jsonArray != null) {
int len = jsonArray.length();
for (int i=0;i<len;i++){
list.add(jsonArray.get(i).toString());
}
}
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How can I convert comma separated string into a List
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answered Feb 15 '12 at 20:59
dasblinkenlightdasblinkenlight
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What is the difference between a generative and a discriminative algorithm?
...simple example. Suppose you have the following data in the form (x,y):
(1,0), (1,0), (2,0), (2, 1)
p(x,y) is
y=0 y=1
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x=1 | 1/2 0
x=2 | 1/4 1/4
p(y|x) is
y=0 y=1
-----------
x=1 | 1 0
x=2 | 1/2 1/2
If you take a few minutes to stare at those two...
Retrieving the last record in each group - MySQL
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1021
MySQL 8.0 now supports windowing functions, like almost all popular SQL implementations. With ...
ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
...here?
– Brad Rippe
May 12 '16 at 14:00
1
this might not be the case when multiple clients/servers...
How to find if a given key exists in a C++ std::map
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edited Aug 28 '13 at 9:05
answered Dec 21 '09 at 12:58
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defaultdict of defaultdict?
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602
Yes like this:
defaultdict(lambda: defaultdict(int))
The argument of a defaultdict (in this ...
Where does Scala look for implicits?
... scope of an argument's type (2.9.1)
Implicit scope of type arguments (2.8.0)
Outer objects for nested types
Other dimensions
Let's give some examples for them:
Implicits Defined in Current Scope
implicit val n: Int = 5
def add(x: Int)(implicit y: Int) = x + y
add(5) // takes n from the current...
Passing variable number of arguments around
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