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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...
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
a...
git stash blunder: git stash pop and ended up with merge conflicts
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered May 15 '10 at 16:56
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How to get next/previous record in MySQL?
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edited Jul 10 '12 at 10:53
Vimalnath
6,12222 gold badges2323 silver badges4444 bronze badges
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How do I get the first n characters of a string without checking the size or going out of bounds?
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Here's a neat solution:
String upToNCharacters = s.substring(0, Math.min(s.length(), n));
Opinion: while this solution is "neat", I think it is actually less readable than a solution that uses if / else in the obvious way. If the reader hasn't seen this trick, he/she has to think ...
How to split a comma-separated value to columns
...R(MAX)
)
AS
BEGIN
DECLARE @value NVARCHAR(MAX),
@pos INT = 0,
@len INT = 0
SET @string = CASE
WHEN RIGHT(@string, 1) != @delimiter
THEN @string + @delimiter
ELSE @string
END
WHILE CHARINDEX(@delimiter, @string, @p...
Create a unique number with javascript time
...econd, and three digit millisecond. So it would look something like this: 20111104103912732 ... this would give enough certainty of a unique number for my purposes.
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How to copy Java Collections list
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edited Dec 30 '13 at 16:22
pickypg
20k44 gold badges6464 silver badges7979 bronze badges
a...
What is the correct MIME type to use for an RSS feed?
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edited Dec 24 '10 at 11:06
answered Feb 27 '09 at 16:58
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