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# lambda

C++11

Function without name.

Specialy useful in conjunction with function that take functions as arguments such as `std::find_if`,

when we only want to use the function passed once.

Good explanation: <http://stackoverflow.com/a/7627218/895245>

TODO: why square brackets? Why not pass by reference as in a regular function?

#include "common.hpp"

int main() {

#if __cplusplus >= 201103L

{

int i = 0;

int j = 0;

auto f = [&i,&j](int k) -> int {i = 1; j = 1; return k + 1;};

assert(f(0) == 1);

assert(i == 1);

assert(j == 1);

}

// Typical application with find_if.

{

std::vector<int> v = {2, 0, 1};

assert(std::find_if(v.begin(), v.end(),

[](int i) {return i % 2 == 1;}) == --v.end());

}

#endif

}