Is there a way to obtain object properties after parsing a JSON string

Question

eg if variable jsonstring contains

{"prod_name":"GM","quantity":100,"price":54.5,"type":"Limit"}

for a code like

   var obj= JSON.parse(jsonstring);

Without knowing the string content is there a way to extract the property/ value names?

`for ... in`, `Object.keys()` ... – Pointy May 06 '14 at 14:19 — Pointy, May 06 '14 at 14:19

pmandell · Answer 1 · 2014-05-06T14:27:18.203

2

You can loop through the object properties.

for ( var prop in obj ) {
    if ( obj.hasOwnProperty(prop) ) {
        console.log( prop + ': ' + obj[prop] );
    }
}

edited May 06 '14 at 14:27

answered May 06 '14 at 14:20

pmandell

2

`hasOwnProperty` isn't really necessary. – Andy May 06 '14 at 14:21
1

This way prevents 'walking' up the prototype chain, only checking the properties directly on the object itself. – pmandell May 06 '14 at 14:25
1

@Andy, if they (or any third-party scripts) have extended the `Object` prototype it is necessary. – Rob M. May 06 '14 at 14:26
It's JSON, so I disagree. – Andy May 06 '14 at 14:38

score 1 · Answer 2 · answered May 06 '14 at 14:20

1

In JavaScript 1.8.5, Object.getOwnPropertyNames returns an array of all properties found directly upon a given object.

Object.getOwnPropertyNames ( obj )

answered May 06 '14 at 14:20

Aditya

2 Answers2