How can I find the first element of an object in Javascript?

Question

I have the following:

var a = {
 "message":"The request is invalid.",
 "modelState":{
    "model.ConfirmPassword":["The password and confirmation password do not match."]
  }
}

var keys = a.modelState.keys;
var firstError = a.modelState[keys[0]];

I would like to have the variable firstError set to "The password and confirmation password do not match."

However it is giving me "Cannot read property '0' of undefined".

Denys Séguret · Accepted Answer · 2014-06-10 13:29:15Z

2

There's no "first" key as keys in objects aren't ordered.

If you want any one, you can do this :

var anyError = a.modelState[Object.keys(a.modelState)[0]];

answered Jun 10, 2014 at 13:29

Denys Séguret

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1 Comment

user3568783 Over a year ago

Thanks very much. Atually I do want "any one" so your answer is perfect for me!

Amit Joki · Accepted Answer · 2014-06-10 13:30:15Z

0

You would probably need this?

var firstError = a.modelState["model.ConfirmPassword"];

answered Jun 10, 2014 at 13:30

Amit Joki

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