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These nodes all have stuff by perl_user123 (showing 1-4 out of ~4?):
| Node ID | Writeup | Created |
| 1163486 | creating a matrix like format | 2016-05-19 15:04 |
| 1079191 | Re^2: Creating a binary matrix | 2014-03-21 06:23 |
| 1079097 | Creating a binary matrix | 2014-03-20 15:59 |
| 878192 | max "value " of an hash | 2010-12-21 08:39 |