pub fn vec_ext_build_flatten_map(env: &mut Environment) -> Result<(), String>Expand description
Vec.flatten_map : flatten (map (map f) xss) = map f (flatten xss)
pub fn vec_ext_build_flatten_map(env: &mut Environment) -> Result<(), String>Vec.flatten_map : flatten (map (map f) xss) = map f (flatten xss)