michael@0: // A map iterator can cope with removing the next entry, then the current entry.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: var map = Map([['a', 0], ['b', 1], ['c', 2], ['d', 3]]);
michael@0: var iter = map[std_iterator]();
michael@0: assertIteratorNext(iter, ['a', 0]);
michael@0: assertIteratorNext(iter, ['b', 1]);
michael@0: map.delete('c');
michael@0: map.delete('b');
michael@0: assertIteratorNext(iter, ['d', 3]);
michael@0: assertIteratorDone(iter, undefined);