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simont

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Fri 2011-03-18 13:33
Errata
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[identity profile] cartesiandaemon.livejournal.comSat 2011-03-19 15:38
Ah! I was trying something similar, but couldn't quite get it to work. Using NULL as a flag on the first iteration was the key I hadn't thought of.

(I also interpreted the structure of your list slightly wrongly, but it didn't make any difference to my result, I don't think.)
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