ICT: Diary
D: 28 W: 05
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| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
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Sunday, 6 February 2022 [ >
]
Nod
Regex
Ranges: ^[a-f]{4} find a range of four letters.
Backrefs: (...).*\1 find a repeating pattern of three letters.
(.)\1{1}[^uy] works regular expressions 101 but doesn't work in regex golf
(?:(.)\1)[^uy] is more efficient, but the answer was:
^(?!(.)+\1)|.u or ^(?!(.)+\1)|ef
This failed in regular expressions 101…
A man, a plan: ^(.)(.).*\2\1$
$Id: dates.htm,v 1
$Id: diary,v 1.38 2025/01/01 22:43:54 fred Exp $