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up vote 11 down vote favorite
1

I have the following json object :

var json = {
    "Lofts": "none",
    "Maisons": "2",
    "HOMES": [{
        "home_id": "1",
        "price": "925",
        "num_of_beds": "2"
    }, {
        "home_id": "2",
        "price": "1425",
        "num_of_beds": "4",
    }, {
        "home_id": "3",
        "price": "333",
        "num_of_beds": "5",
    }]
};

How can I filter this object and remain with the HOMES property where home_id = 2 ?

Result:

var json = {
    "Lofts": "none",
    "Maisons": "2",
    "HOMES": [{
        "home_id": "2",
        "price": "1425",
        "num_of_beds": "4",
    }]
};

Is there any way I can cycle the object and mantein all the properties( also lofts and maisons)?

Thanks

share|improve this question
up vote 11 down vote accepted

You can use Array#filter and assign the result directly to the property HOMES.

var json = { "Lofts": "none", "Maisons": "2", "HOMES": [{ "home_id": "1", "price": "925", "num_of_beds": "2" }, { "home_id": "2", "price": "1425", "num_of_beds": "4", }, { "home_id": "3", "price": "333", "num_of_beds": "5", }] };

json.HOMES = json.HOMES.filter(function (a) {
    return a.home_id === '2';
});

document.write('<pre>' + JSON.stringify(json, 0, 4) + '</pre>');

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1  
Thank you so much !!! – Codrina Valo yesterday
up vote 2 down vote

With the use of utility library Lodash, you can use the method find.

Find: Iterates over elements of collection (Array|Object), returning the first element predicate returns truthy for. The predicate is invoked with three arguments: (value, index|key, collection).

_.find(collection, [predicate=_.identity])

Code:

var json = { "Lofts": "none", "Maisons": "2", "HOMES": [{ "home_id": "1", "price": "925", "num_of_beds": "2" }, { "home_id": "2", "price": "1425", "num_of_beds": "4", }, { "home_id": "3", "price": "333", "num_of_beds": "5", }] };
    
json.HOMES = [_.find(json.HOMES, function(o) {
  return o.home_id === '2';
})];

document.write('<pre>' + JSON.stringify(json, 0, 4) + '</pre>');
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.12.0/lodash.min.js"></script>

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