Question

114

find a value inside array of JSON object

rated 0 times [ 116] [ 2] / answers: 1 / hits: 65423 / 9 Years ago, wed, april 29, 2015, 12:00:00

I get below Array of JSON objects from JSP

Titles:[                          

    {

    Book3 : BULLETIN 3

    }   

    ,

    {

    Book1 : BULLETIN 1

    }

    ,

    {

    Book2 : BULLETIN 2

    }    

]

On JS side, it is parsed and I see an array with 3 objects.
Now, I want to find/identify a value when I pass String key.

For e.g. when I pass Book2 I should get value BULLETIN 2.
Can someone help me identify the approach?

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nestorjarettg

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answered 9 Years ago longd · Accepted Answer

Try this

var data = {

    Titles: [{

        Book3: BULLETIN 3

    }, {

        Book1: BULLETIN 1

    }, {

        Book2: BULLETIN 2

    }]

};



function getValueByKey(key, data) {

    var i, len = data.length;

    

    for (i = 0; i < len; i++) {

        if (data[i] && data[i].hasOwnProperty(key)) {

            return data[i][key];

        }

    }

    

    return -1;

}



console.log(getValueByKey('Book2', data.Titles));