michael@0: // A for-of loop over an array continues to the end if the array grows during iteration.
michael@0: 
michael@0: var a = [0, 1, 1, 0, 1, 0, 0];
michael@0: var s = '';
michael@0: for (var v of a) {
michael@0:     s += v;
michael@0:     if (v === 1)
michael@0:         a.push(2);
michael@0: }
michael@0: assertEq(s, '0110100222');