michael@0: // The argument to Map can be a generator-expression.
michael@0: 
michael@0: var arr = [1, 2, "green", "red"];
michael@0: var m = Map([v, v] for (v of arr));
michael@0: assertEq(m.size, 4);
michael@0: 
michael@0: for (var i = 0; i < 4; i++)
michael@0:     assertEq(m.get(arr[i]), arr[i]);