How to access array stored in Json object?

Question

I've json response like this, I want to get all project names from this.

I have done as usual as iterate through arrays but here "d" is not an array. How can I do to get result:

{
    "d": {
    "results": [
        {
            "ProjectId": "696fcc7c-f355-e511-93f0-00155d008500",
            "ProjectName": "Payroll",
            "EnterpriseProjectTypeDescription": null,
            "EnterpriseProjectTypeId": null,
            "EnterpriseProjectTypeIsDefault": null
        },
        {
            "ProjectId": "696fcc7c-f355-e511-93f0-00155d008505",
            "ProjectName": "Permanant",
            "EnterpriseProjectTypeDescription": null,
            "EnterpriseProjectTypeId": null,
            "EnterpriseProjectTypeIsDefault": null
        }
    ]
    }
}

iterate through obj.d.results to get your different projects. — h2ooooooo
– h2ooooooo, Commented Sep 29, 2015 at 6:02

Cerbrus · Accepted Answer · 2015-09-29 06:02:10Z

3

Use Array.prototype.map():

var names = myData.d.results.map(function(item){
    return item.ProjectName;
});

This will result in an array like:

["Payroll", "Permanant"]

(Assuming myData is the object in your question)

answered Sep 29, 2015 at 6:02

Cerbrus

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4 Comments

Cerbrus Over a year ago

What's with the downvote? What's wrong with this answer?

h2ooooooo Over a year ago

I didn't downvote you, but I'm assuming it's due to Array.prototype.map first being introduced in IE9. A lot of business applications are reliant on a minimum of IE8 (which even Google will drop support for in a month.. then again, the MDN link has a polyfill, so it shouldn't be an issue).

Cerbrus Over a year ago

If that is the reason, then I feel sorry for the person that has to support IE8 ;-)

h2ooooooo Over a year ago

Tell me about it! Hopefully Microsoft's "update everything to Windows 10" will get rid of the XP installations that can't upgrade to IE9. To think that there are still businesses relying on a 14 year old OS to function is beyond me!

Pranav C Balan · Accepted Answer · 2015-09-29 06:14:44Z

You can use jsonObject.d.results to get the array from response and use forEach() to iterate array

var res = {
  "d": {
    "results": [{
        "ProjectId": "696fcc7c-f355-e511-93f0-00155d008500",
        "ProjectName": "Payroll",
        "EnterpriseProjectTypeDescription": null,
        "EnterpriseProjectTypeId": null,
        "EnterpriseProjectTypeIsDefault": null
      }, {
        "ProjectId": "696fcc7c-f355-e511-93f0-00155d008505",
        "ProjectName": "Permanant",
        "EnterpriseProjectTypeDescription": null,
        "EnterpriseProjectTypeId": null,
        "EnterpriseProjectTypeIsDefault": null
      }
    ]
  }
};

res.d.results.forEach(function(v) {
  document.write(v.ProjectName + '<br>')
})

If you want to get it as an array then you can use map()

var res = {
  "d": {
    "results": [{
      "ProjectId": "696fcc7c-f355-e511-93f0-00155d008500",
      "ProjectName": "Payroll",
      "EnterpriseProjectTypeDescription": null,
      "EnterpriseProjectTypeId": null,
      "EnterpriseProjectTypeIsDefault": null
    }, {
      "ProjectId": "696fcc7c-f355-e511-93f0-00155d008505",
      "ProjectName": "Permanant",
      "EnterpriseProjectTypeDescription": null,
      "EnterpriseProjectTypeId": null,
      "EnterpriseProjectTypeIsDefault": null
    }]
  }
};

var result = res.d.results.map(function(v) {
  return v.ProjectName;
})

document.write(JSON.stringify(result));

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