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# Mononofu/sort.py

Created March 18, 2012 20:09
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algodat sort
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 import random def sort(a, feedback=False): lower_limit = 0 upper_limit = len(a) - 1 steps = 0 while(lower_limit != upper_limit ): i = lower_limit while i < upper_limit - 1: if a[i] > a[i+1]: a[i], a[i + 1] = a[i + 1], a[i] if upper_limit == i+1 and upper_limit < len(a) - 1: upper_limit += 1 if lower_limit == i and lower_limit > 0: lower_limit -= 1 elif lower_limit + 1 == i: lower_limit += 1 i += 1 steps += 1 i = upper_limit - 1 while i >= lower_limit: if a[i] > a[i+1]: a[i], a[i + 1] = a[i + 1], a[i] if upper_limit == i+1 and upper_limit < len(a) - 1: upper_limit += 1 if lower_limit == i and lower_limit > 0: lower_limit -= 1 elif upper_limit - 1 == i: upper_limit -= 1 i -= 1 steps += 1 if feedback: print "list of length %d took %d steps" % (len(a), steps) print "running tests:", for i in range(10000): a = [random.randint(0, 100) for x in range(20)] b = a[:] a.sort() sort(b) if a != b: print " error with list %s == %s" % (a, b) print " finished" print unsorted = [random.randint(0, 100) for x in range(20)] print "Sort this list: %s" % unsorted sort(unsorted, True) print unsorted print unsorted.reverse() print "Sort reversed list: %s" % unsorted sort(unsorted, True) print unsorted
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