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pjs.define("a", { type: 'integer', dim: 3 });
pjs.define("b", { type: 'integer', dim: 3 });
pjs.define("c", { type: 'integer', dim: 9 });
 
a = [1, 2, 3];
b = [4, 5, 6];
c = a.cat(b, 7, 8, 9);
// c now contains [1, 2, 4, 5, 6, 7, 8, 9]