How to Efficiently Retrieve a Random Property from a JavaScript Object?

Retrieving a Random Object Property with Enhanced Efficiency

Suppose you encounter an object in Javascript that resembles this:

{cat: 'meow', dog: 'woof', snake: 'hiss'}

You may wish to obtain a random property from this object. Instead of employing a protracted method like the one below:

function pickRandomProperty(obj) {
    var prop, len = 0, randomPos, pos = 0;
    for (prop in obj) {
        if (obj.hasOwnProperty(prop)) {
            len += 1;
        }
    }
    randomPos = Math.floor(Math.random() * len);
    for (prop in obj) {
        if (obj.hasOwnProperty(prop)) {
            if (pos === randomPos) {
                return prop;
            }
            pos += 1;
        }
    }       
}

Consider leveraging this optimized approach:

var randomProperty = function (obj) {
    var keys = Object.keys(obj);
    return obj[keys[ keys.length * Math.random() << 0]];
};

This technique optimizes performance enhancements by leveraging the Object.keys() method to retrieve an array of the object's keys. Subsequently, it employs the array's length multiplied by a random number to obtain an index for the array to retrieve the key. Finally, it accesses the corresponding property in the object to return the desired random property.

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