json-q
Version:
Retrieves values from JSON objects (and JavaScript objects) by css-selector-like query (includes attribute filters and array flattening).
16 lines (14 loc) • 704 B
JavaScript
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);
} });