x   y
1 2 3 4 5 6 7 a b  -- second swap and recurse

[download]
off by one :) should be, of course: 
                x y
1 2 3 4 5 6 7 a b  -- second swap and recurse

[download]

In reply to Re^5: [OT] Swapping buffers in place. by Anonymous Monk
in thread [OT] Swapping buffers in place. by BrowserUk

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