cull
Keep only items from the list where the corresponding boolean is true.
g.cull([1, 2, 3, 4], [true, false, false, true]);
If the input and boolean list have a different size, the boolean list will wrap around:
g.cull([1, 2, 3, 4], [false, true])
Parameters
l: The list of items.booleans: A list oftrueorfalsevalues.