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Prolog predicate to get an element from a 2-dimensional list at some (Row, Column).
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| % Get an element from a 2-dimensional list at (Row,Column) | |
| % using 0-based indexing. | |
| nth0_2(Row, Column, List, Element) :- | |
| nth0(Row, List, SubList), | |
| nth0(Column, SubList, Element). | |
| % Example use: | |
| % | |
| % ?- nth0_2(2, 1, [[1,0], [2,9], [3,4]], El). | |
| % El = 4. |
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