def __zero_block_outside_irs(self, r, other_intrangeset):
my_intrangeset = IntRangeSet(r)
intersection_intrangeset = my_intrangeset & other_intrangeset
if intersection_intrangeset.isempty:
del self.ranges_to_arrays[r]
else:
mask = np.zeros(len(my_intrangeset), dtype=bool)
for s in intersection_intrangeset.ranges():
start = my_intrangeset.index(s[0])
end = start + s[1] - s[0]
mask[start:end] = True
self.ranges_to_arrays[r][~mask] = 0
self.ranges_to_arrays[r].T[~mask] = 0 # for compatibility with 1d arrays
