JS array with key in node

Question

I need to add some value to some "array" but I want that if for example this array has already the value which I want to insert to get some exception,which object or "special array" I can use in java script in node

Is there a reason you can't just use a helper function that runs an indexOf check and throws the error manually? — MDEV
– MDEV, Commented Jul 12, 2015 at 13:59

Ara Yeressian · Accepted Answer · 2015-07-12 15:01:56Z

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'));

edited Jul 12, 2015 at 15:01

answered Jul 12, 2015 at 14:50

Ara Yeressian

4,1253 gold badges29 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sofre Garevski · Accepted Answer · 2015-07-12 14:33:32Z

0

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

answered Jul 12, 2015 at 14:33

Sofre Garevski

645 bronze badges

Collectives™ on Stack Overflow

JS array with key in node

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related