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How do 20 questions AI algorithms work?
Simple online games of 20 questions powered by an eerily accurate AI.
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How to inherit constructors?
Imagine a base class with many constructors and a virtual method
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How to get a function name as a string?
In Python, how do I get a function name as a string, without calling the function?
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Encode html entities in javascript
I am working in a CMS which allows users to enter content. The problem is that when they add symbols ® , it may not display well in all browsers. I would like to set up a list of symbols that must be searched for, and then converted to the corresponding html entity. For example
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How to check if a process is running via a batch script
How can I check if an application is running from a batch (well cmd) file?
18 Answers
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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?
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First, to address your first inquiry:
When you see this in .h file:
#ifndef FILE_H
#define FILE_H
/* ... Declarations etc here ... */
#endif
This is a preprocessor technique of preventing a header file from being included multiple times, which can ...
Javascript “Not a Constructor” Exception while creating objects
I am defining an object like this:
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Best practice to mark deprecated code in Ruby?
I'd like to mark a method as deprecated, so the people using it can easily check their code and catch up. In Java you set @Deprecated and everybody knows what this means.
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How do we count rows using older versions of Hibernate (~2009)?
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For older versions of Hibernate (<5.2):
Assuming the class name is Book:
return (Number) session.createCriteria("Book")
.setProjection(Projections.rowCount())
.uniqueResult();
It is at least a Number, most likely a Long.
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What is polymorphism, what is it for, and how is it used?
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If you think about the Greek roots of the term, it should become obvious.
Poly = many: polygon = many-sided, polystyrene = many styrenes (a), polyglot = many languages, and so on.
Morph = change or form: morphology = study of biolog...