JS array with key in node

Question

我需要在“数组”中添加一些值，但是我想，例如，如果该数组已经具有要插入以获取某些异常的值，则可以在节点的Java脚本中使用哪个对象或“特殊数组”

Answer 1

I guess you want something like this:

 var dataStore = { _dataStore: {}, add: function(key, data) { if (this._dataStore[key]) { throw new Error('already exist'); } this._dataStore[key] = data; }, get: function(key) { return this._dataStore[key]; } }; //usage dataStore.add('some-key', 'test'); //will throw exception //dataStore.add('some-key', 'test'); alert(dataStore.get('some-key')); 

Answer 2

Best would be to use objects. Also good library to use for this kind of stuff is lodash .