Example using assoc:
// Definition of
polyhedra
polyhedra =
[ ["cube", [6, 4]],
["dodecahedron", [12,
5]],
["icosahedron", [20, 3]],
["octahedron", [8, 3]],
["tetrahedron", [4, 3]]
];
// Expression to be
evaluated
assoc("octahedron",
polyhedra);
// Expected result:
["octahedron", [8,
3]]