code: def arr_intersect(ar1, ar2):
      aux = np.concatenate((ar1, ar2))
      aux.sort()
      return aux[:-1][aux[1:] == aux[:-1]]
  
imports: from __future__ import print_function
  import locale
  import numpy
  import numba
  from pynndescent.utils import norm, tau_rand
  from pynndescent.distances import kantorovich, jensen_shannon_divergence, symmetric_kl_divergence
label_desc: Use image node_id 4 for calling a global function with example usage: arr_intersect(ar1, ar2) and returns: aux