JSON object's property value to list

Question

How can we list the value for a property (e.g., "ObjectPropertyTwo") in the following JSON object array?

    {
    "KeyOne": [
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
    ],
    "KeyTwo": [
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
    ],
    "KeyThree": [
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        }
    ]
}

Your edit was inappropriate and off-topic, and was rolled back properly - by a moderator. I am locking this to prevent further editing for now. When the lock expires, *do not* add back in your off-topic comments. — Andrew Barber, Oct 21 '13 at 17:40

tymeJV · Accepted Answer · 2013-09-27T16:39:24.197

2

How about:

for (var key in data) { //data being the object
    for (var i = 0; i < data[key].length; i++) {
        console.log(data[key][i].ObjectPropertyTwo);
    }
}

Demo: http://jsfiddle.net/tymeJV/csFms/

edited Sep 27 '13 at 16:39

answered Sep 27 '13 at 16:33

tymeJV

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My apologies for my delay in response, I confirmed your answer solved the problem thank you. – id.ot Sep 27 '13 at 20:17

maerics · Answer 2 · 2013-09-30T19:16:59.767

1

function listNestedProperties(object, property) {
  return Object.keys(object).reduce(function(memo, key) {
    object[key].forEach(function(o2) {
      memo.push(o2.ObjectPropertyTwo);
    });
    return memo;
  }, []);
}

listNestedProperties(yourObject, 'ObjectPropertyTwo');
// => ["value", "value", "value", "value", "value", "value", "value", "value", "value"]

edited Sep 30 '13 at 19:16

answered Sep 27 '13 at 16:44

maerics

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Thanks @maerics, but this didn't work, http://jsfiddle.net/mrbilljsf/Pcrnz/2/. – id.ot Sep 30 '13 at 18:52
@id.ot: oops, there was a typo; see the updated answer. – maerics Sep 30 '13 at 19:17

JSON object's property value to list

2 Answers2