Sort a JavaScript object

You want a function that takes an object and a comparison function, and returns the object sorted using the comparison function. Something like this:

// Sort by numeric value 
sortObject(
  { 'John': 100, 'Alice': 300, 'Bob': 200 }, 
  (a, b) => a[1] - b[1]
)
// { John: 100, Bob: 200, Alice: 300 }

// Sort by key
sortObject(
  { 'John': 100, 'Alice': 300, 'Bob': 200 }, 
  (a, b) => a[0].localeCompare(b[0])
)
// { Alice: 300, Bob: 200, John: 100 }

Here’s how:

const sortObject = (obj, compareFn) => {
  return Object
    .entries(obj)
    .sort(compareFn)
    .reduce((sortedObj, [key, val]) => {
      return { ...sortedObj, [key]: val }
    }, {})
}

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