It's cl-remove-if-not
. A bit of a mouthful, but it works.
To elaborate a bit, you need
(require 'cl-lib)
to get this function. There's an alias for it, called remove-if-not
, but
I prefer not to use it, since it may look like I'm using remove-if-not
from cl
.
It's a good practice to include the prefix, not doing using namespace std
in C++,
but saying std::cout
each time.