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Execute function for each list element in reverse

Executes the provided function once for each list element, starting from the list's last element.

Use a for loop in combination with slice notation to execute fn for each element in itr, starting from the last one.

def for_each_right(itr, fn):
  for el in itr[::-1]:
    fn(el)

for_each_right([1, 2, 3], print) # 3 2 1

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