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(C++) Predicate

A predicate is a logical expression that evaluates to true or false, like in if-statements.

Example

In the example below, it is shown how to replace negative values by zero. The predicate is if an integer is less then zero.


#include <algorithm>

#include <numeric>

#include <vector>



void ReplaceNegativeByZero(std::vector<int>& v)

{

  std::replace_if(v.begin(),v.end(),

    std::bind2nd(std::less<int>(),0),0);

}

STL predicates

An overview of STL predicates names and their corresponding operator, from [0]. These predicates can be found in the header file functional.

My predicates

In_regex

References

Bjarne Stroustrup

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