Extract value from object using javascript

Question

I have the following object...

var object = doc.$set;
console.log(object);

The console.log above outputs the following...

{
  createdBy: 'o5Wye6LLMGNXLn7HY',
  createdAt: Mon Apr 11 2016 15:25:35 GMT+1000 (AEST), 
  'contactDetails.orderedBy': 'MvCun8p6vxndj3cr8',
  updatedAt: Mon Apr 11 2016 18:04:14 GMT+1000 (AEST)
}

How can I get the value from 'contactDetails.orderedBy'?

Where something like this works no problem...

var createdBy = doc.$set.createdBy;

But this doesn't...

var orderedBy = doc.$set.contactDetails.orderedBy;

Is there a way that I can use javascript to extract the value instead? Like maybe convert it to a string and then split it or something along those lines? Is this possible?

Thanks

score 3 · Accepted Answer · edited Apr 11 '16 at 12:27

3

Try var orderedBy = doc.$set['contactDetails.orderedBy'];.

Since an object key is a numeric literal or a valid identifier name, it is necessary to quote the key contactDetails.orderedBy to avoid a syntax error.

Quotes can only be omitted if the property name is a numeric literal or a valid identifier name.

In the case of createdBy key, you could retrieve the value like object.createdBy but in the case of contactDetails.orderedBy you need to quote, so access it via object[contactDetails.orderedBy].

edited Apr 11 '16 at 12:27

Serks

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answered Apr 11 '16 at 08:17

Lionel T

1,559
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You should explain why that would work. – Petter Pettersson Apr 11 '16 at 08:32
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - [From Review](/review/low-quality-posts/11971268) – Muhammed Refaat Apr 11 '16 at 08:43
1

right, thanks for the advice. @MuhammedRefaat just edited the answer. – Lionel T Apr 11 '16 at 08:49
@petter-pettersson edited! – Lionel T Apr 11 '16 at 08:49
now this can be considered as a complete answer – Muhammed Refaat Apr 11 '16 at 08:51
thank you, always learning... – Lionel T Apr 11 '16 at 08:52

score 0 · Answer 2 · answered Apr 11 '16 at 08:36

If you want to manipulate object than you need understand the concept of key and value

see this examples

var object={
 "iAmFirstKey":'I am value',
 "i.am.second.key":'i am value'
}

so In your case your contacDetails.orderedBy is not Object inside Object it is an key ("string")

so use like this doc.$set['contacDetails.orderedBy']; you will get your value

Extract value from object using javascript

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