michael@0: // For and if clauses can nest without limit in comprehensions.  This is
michael@0: // unlike JS 1.8 comprehensions, which can only have one trailing "if"
michael@0: // clause.
michael@0: 
michael@0: function* range(start, end) {
michael@0:   for (var n = start; n < end; n++)
michael@0:     yield n;
michael@0: }
michael@0: 
michael@0: function primesBetween6And25() {
michael@0:   return [for (n of range(6, 25)) if (n % 2) if (n % 3) if (n % 5) n];
michael@0: }
michael@0: assertDeepEq(primesBetween6And25(), [7,11,13,17,19,23]);
michael@0: 
michael@0: function countUpToEvens(limit) {
michael@0:   return [for (n of range(0, limit)) if (!(n % 2)) for (m of range(0, n)) m]
michael@0: }
michael@0: assertDeepEq(countUpToEvens(7), [0,1,0,1,2,3,0,1,2,3,4,5]);
michael@0: 
michael@0: reportCompare(null, null, "test");