| // Removing a Map entry already visited by an iterator does not cause any | |
| // entries to be skipped. | |
| var map = new Map(); | |
| for (var i = 0; i < 20; i++) | |
| map.set(String.fromCharCode('A'.charCodeAt(0) + i), i); | |
| var log = ''; | |
| for (var [k, v] of map) { | |
| log += k; | |
| if (v % 5 === 4) { | |
| // Delete all entries preceding this one. | |
| for (let [k1, v1] of map) { | |
| if (k1 === k) | |
| break; | |
| map.delete(k1); | |
| } | |
| } | |
| } | |
| assertEq(log, 'ABCDEFGHIJKLMNOPQRST'); | |
| assertEq(map.size, 1); // Only the last entry remains. | |
| assertEq(map.get('T'), 19); |