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32 lines
911 B
Python
32 lines
911 B
Python
from typing import List
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def radix_sort(list_of_ints: List[int]) -> List[int]:
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"""
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radix_sort(range(15)) == sorted(range(15))
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True
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radix_sort(reversed(range(15))) == sorted(range(15))
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True
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radix_sort([1,100,10,1000]) == sorted([1,100,10,1000])
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True
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"""
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RADIX = 10
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placement = 1
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max_digit = max(list_of_ints)
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while placement <= max_digit:
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# declare and initialize empty buckets
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buckets = [list() for _ in range(RADIX)]
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# split list_of_ints between the buckets
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for i in list_of_ints:
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tmp = int((i / placement) % RADIX)
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buckets[tmp].append(i)
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# put each buckets' contents into list_of_ints
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a = 0
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for b in range(RADIX):
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for i in buckets[b]:
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list_of_ints[a] = i
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a += 1
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# move to next
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placement *= RADIX
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return list_of_ints
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