| var metadata = require('./_metadata'); |
| var anObject = require('./_an-object'); |
| var toMetaKey = metadata.key; |
| var getOrCreateMetadataMap = metadata.map; |
| var store = metadata.store; |
| |
| metadata.exp({ deleteMetadata: function deleteMetadata(metadataKey, target /* , targetKey */) { |
| var targetKey = arguments.length < 3 ? undefined : toMetaKey(arguments[2]); |
| var metadataMap = getOrCreateMetadataMap(anObject(target), targetKey, false); |
| if (metadataMap === undefined || !metadataMap['delete'](metadataKey)) return false; |
| if (metadataMap.size) return true; |
| var targetMetadata = store.get(target); |
| targetMetadata['delete'](targetKey); |
| return !!targetMetadata.size || store['delete'](target); |
| } }); |