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How does database indexing work? [closed]
Given that indexing is so important as your data set increases in size, can someone explain how indexing works at a database-agnostic level?
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Checking for empty queryset in Django
What is the recommended idiom for checking whether a query returned any results?
Example:
7 Answers
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Why is === faster than == in PHP?
Why is === faster than == in PHP?
11 Answers
11
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Why is `std::move` named `std::move`?
The C++11 std::move(x) function doesn't really move anything at all. It is just a cast to r-value. Why was this done? Isn't this misleading?
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Which .NET Dependency Injection frameworks are worth looking into? [closed]
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edit (not by the author): There is a comprehensive list of IoC frameworks available at https://github.com/quozd/awesome-dotnet/blob/master/README.md#ioc:
Castle Windsor - Castle Windsor is best of breed, mature Inversion of Control container available for...
Why doesn't Java allow overriding of static methods?
Why is it not possible to override static methods?
22 Answers
22
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Explain Morris inorder tree traversal without using stacks or recursion
Can someone please help me understand the following Morris inorder tree traversal algorithm without using stacks or recursion ? I was trying to understand how it works, but its just escaping me.
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Defeating a Poker Bot
There is a new Open Source poker bot called PokerPirate . I am interested in any creative ways in which a web application could detect/thwart/defeat a poker bot. (This is a purely academic discussion, in the same spirit that PokerPirate was written.)
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How to check whether an object is a date?
... it will return true for invalid dates too, e.g. new Date('random_string') is also instance of Date
date instanceof Date
This will fail if objects are passed across frame boundaries.
A work-around for this is to check the object's class via
Object.prototype.toString.call(date) === '[object Date...
Templated check for the existence of a class member function?
Is it possible to write a template that changes behavior depending on if a certain member function is defined on a class?
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