On Jan 16, 2006, at 3:18 AM, Vladislav Lazarenko wrote:
Is there any library to do thing like this more easily? As a result, we will have rating in range 0-5. [code] int x = -10; int rating = std::max(std::min(x, 5), 0); [/code]
You want to "clip" a value to a range. The code you are describing seems fine for this purpose. It's hard to imagine something more easy, apart from a dedicated functor. If you'd have to do it a lot, you probably would program your own functor: template <class T> struct enforce_minmax { enforce_minmax(T low, T high) : m_low(low), m_high(high) {} T operator()(const T& x) const { return std::max(std::min(x,high), low); } T m_low, m_high; }; Your code would be rewritten: enforce_minmax<int> enforce(0, 5); int rating = enforce(x); The advantage is to apply to a collection, as in: std::transform( v.begin(), v.end(), v.begin(), enforce_minmax<int> (0,5) );
I looked at the minmax library, but looks like there is not such function :-? Maybe I am looking in a wrong way?
That is not the purpose of the minmax library, but if it is widely useful (and it seems it might be) I'd be happy to add it in. -- Hervé Brönnimann CIS, Polytechnic University hbr@poly.edu