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Add random::uniform_from(container)

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This commit is contained in:
Nikita Lisitsa 2022-02-09 19:34:37 +03:00
parent ef80db2620
commit 02382155a7
1 changed files with 9 additions and 0 deletions
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9
libs/random/include/psemek/random/uniform.hpp
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@ -7,6 +7,7 @@
#include <psemek/geom/box.hpp> #include <psemek/geom/box.hpp>
#include <type_traits> #include <type_traits>
#include <stdexcept>
namespace psemek::random namespace psemek::random
{ {
@ -47,4 +48,12 @@ namespace psemek::random
return uniform(rng, T{0}, T{2 * geom::pi}); return uniform(rng, T{0}, T{2 * geom::pi});
} }
template <typename RNG, typename Container>
auto & uniform_from(RNG && rng, Container & container)
{
if (container.empty())
throw std::runtime_error("cannot sample from empty container");
return container[uniform<std::size_t>(rng, 0, container.size() - 1)];
}
} }