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Finding three elements in an array whose sum is closest to a given number
Given an array of integers, A 1 , A 2 , ..., A n , including negatives and positives, and another integer S. Now we need to find three different integers in the array, whose sum is closest to the given integer S. If there exists more than one solution, any of them is ok.
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How are virtual functions and vtable implemented?
We all know what virtual functions are in C++, but how are they implemented at a deep level?
12 Answers
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What is the difference between a heuristic and an algorithm?
What is the difference between a heuristic and an algorithm?
12 Answers
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With arrays, why is it the case that a[5] == 5[a]?
As Joel points out in Stack Overflow podcast #34 , in C Programming Language (aka: K & R), there is mention of this property of arrays in C: a[5] == 5[a]
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Scala 2.8 breakOut
In Scala 2.8 , there is an object in scala.collection.package.scala :
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C++ equivalent of java's instanceof
What is the preferred method to achieve the C++ equivalent of java's instanceof ?
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How to avoid overflow in expr. A * B - C * D
I need to compute an expression which looks like:
A*B - C*D , where their types are: signed long long int A, B, C, D;
Each number can be really big (not overflowing its type). While A*B could cause overflow, at same time expression A*B - C*D can be really small. How can I compute it correctly...
Why is there no tuple comprehension in Python?
As we all know, there's list comprehension, like
10 Answers
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Functions that return a function
I'm stuck with this concept of 'Functions that return functions'. I'm referring the book 'Object Oriented Javascript' by Stoyan Stefanov.
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What must I know to use GNU Screen properly? [closed]
I've just introduced a friend to GNU Screen and they're having a hard time getting used to it. That makes me think about the essential things he needs to know about the excellent Screen utility, the same things that you'd think worthwhile to teach someone, a beginner, from the ground up. What ar...