find a value inside array of JSON object [closed]

Answer 1

Let's create a function to get an object in an array for that, that takes two arguments: the array and the key of the property you want to get:

function getObjectInArray(arr, key) {    
    for (var i = 0; i < arr.length; i++) {
        if (arr[i].hasOwnProperty(key)) return arr[i][key];
    }
}

This loops through each object looking for that specific key.

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Solution: Now you could do something like getObjectInArray(titlesJSONArray, "Book2") and it should return "BULLETIN 2".

var titlesJSONArray = [ { "Book3": "BULLETIN 3" }, ... ]; // and so on
var book2 = getObjectInArray(titlesJSONArray, "Book2"); // => "BULLETIN 2"