Prasad, Ramit wrote:
>>
> for i in xrange (N-1):
> for j in xrange (i, N):
> if a[j] < a[i]:
> a[i], a[j] = a[j], a[i]
>> It's what Wikipedia says a selection sort is: put the least element in
>> [0], the least of the remaining elements in [1], etc.
>
> If your only requirement to match to selection sort is the end result,
> then every sort would be selection sort. If you meant "put the least
> element in [0] in the first pass" then that would indeed be selection
> sort, but that is not what the above code does. The above code is bubble
> sort.
Well, the classic bubble sort swaps adjacent elements until the extreme one
gets all the way to the end. This sort continually swaps with the end
element during one pass until the end element holds the extreme. Then it
shrinks the range and swaps then next less extreme into the new end element.
It does extra swaps because it combines the swap operation with recording
the temporary extreme while it searches the subrange.
Mel.
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