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row() and col() functions for variable matrices #2

scand1sk opened this Issue Jan 23, 2015 · 0 comments


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scand1sk commented Jan 23, 2015

There are MiniZinc builtins for row() and col() projection of matrices of parameters. I recently modelled timetabling problems where I required such projections for matrices of variables, which do not seem to be provided. I could implement them easily, maybe they could be added to builtins:

function array [int] of var int: col(array [int, int] of var int: tab, par int: c) = 
  [tab[i, c] | i in index_set_1of2(tab)];
function array [int] of var int: row(array [int, int] of var int: tab, par int: r) = 
  [tab[r, i] | i in index_set_2of2(tab)];
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