Another myth, about C++ lambdas

Myth: Lambda expressions can cause heap allocations. I see this myth coming up a lot. People think that lambdas can cause a heap allocation – on Reddit, on StackOverflow, on Channel9 comments, in personal conversations. I don’t blame people for thinking this – C++ is complex. But it always seems to be some vague notion… Continue reading Another myth, about C++ lambdas

A persistent myth about STL’s remove (and friends)

There seems to be a persistent myth about STL’s remove, remove_if, etc. Ask even a relatively experienced C++ programmer to explain this code. vector v = { 1,2,3,4,5 }; v.erase(remove_if(v.begin(), v.end(), [] (int i) { return (i & 1) == 0; }), v.end()); They’ll recognize the erase-remove idiom and correctly say that it’s removing even… Continue reading A persistent myth about STL’s remove (and friends)