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javascriptobjectproperties

Accessing a JavaScript's object property without knowing that property name

Situation

I have a JSON object which is returned. And Below is an example of one. The who in this particular example can change to whatever property name is required. So for example next time this will be name rather than who

 [{"who":"Arthur"},{"who":"Craig"},{"who":"Dan"},{"who":"Daniel"},{"who":"Frank"},{"who":"Ian"},{"who":"jamie"},{"who":"Jason"},{"who":"jaz"},{"who":"Liam"},{"who":"Paul"},{"who":"Shaun"},{"who":"Wayne"}]

Problem

In my JS I need to be able to refer to the property and access its data without using its name as the name will always be something different.

What I have tried

data.forEach(function(m){
    console.info(m); // Object { who="Craig"}
    console.info(m.who); // Craig, as expected
    console.info(m[0]); // now not sure who to get it if who changes to name
});
Solution

  • Object.keys(m)[0] should return the first enumerable property name in the object m.

    So if m = {"who": "Arthur"}; then m[Object.keys(m)[0]] will be "Arthur".

    https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Object/keys

    Alternatively: Object.values(m)[0]. See Object.values