Object.keys(obj)
to get all the properties of the object, Array.prototype.reverse()
to reverse their order.Array.prototype.forEach()
to run the provided function for each key-value pair.const forOwnRight = (obj, fn) =>
Object.keys(obj)
.reverse()
.forEach(key => fn(obj[key], key, obj));
forOwnRight({ foo: 'bar', a: 1 }, v => console.log(v)); // 1, 'bar'
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