Accessing JSON Array Data Without Knowing Its Keys

JavaScript
1

Suppose a json file contains the following array

[{"keyABC":"R"},{"key123":"J"},{"keyDEF":"H"}]

How can I get the key using just the index of the array using jQuery?
2

Hey,

So this seems to work:

var json = [{"keyABC":"R"},{"key123":"J"},{"keyDEF":"H"}];

for (var i = 0; i < json.length; i++){
    var obj = json[i];
    for (var key in obj){
        var attrName = key;
        var attrValue = obj[key];
        console.log(attrName)
    }
}

Taken from https://stackoverflow.com/questions/1078118/how-do-i-iterate-over-a-json-structure

4

Random access of an array is already possible, regardless of what’s IN the array.

json[Math.random(json.length)]

There’s no value in randomly naming the keys in your objects; the objects should be a standard form.

[{key:"ABC",question:"Question: ABC is known as",answer:"Alphabetic"},{key:"XYZ",question:"What are the last 3 letters of the alphabet?",answer:"XYZ"},...]

2 Likes
5

Thank you all for your reply. I was able to get the solution that mrlagmer provided to work by incorporating the random number generator function into the solution.

6

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