Arranging a list based on additional factors

I'm struggling to grasp the functionality of the Array.sort method. In my case, I have an array structured as follows:

[
  {
    "votes": 3,
    "suggestedDate": "2019-12-01T01:13:00.978Z"
  },
  {
    "votes": 1,
    "suggestedDate": "2020-05-14T21:55:05.879Z"
  },
  {
    "votes": 1,
    "suggestedDate": "2019-12-01T03:22:40.848Z"
  }
]

Currently, I am utilizing 

things.sort((a, b) => b.votes - a.votes)
. However, this order appears random when votes are equal. Can anyone recommend a sort function that will ensure a stable and date-based order in such scenarios?

javascriptarrayssorting

Answer №1

How can I achieve a stable, date-based order when votes are equal?

To maintain a consistent ordering based on dates when the number of votes is the same, you can customize the existing array.sort callback function by considering both the votes and suggestedDate parameters.

const things = [{
    "votes": 3,
    "suggestedDate": "2019-12-01T01:13:00.978Z"
  },
  {
    "votes": 1,
    "suggestedDate": "2020-05-14T21:55:05.879Z"
  },
  {
    "votes": 1,
    "suggestedDate": "2019-12-01T03:22:40.848Z"
  }
]

things.sort((a, b) => {

  if (b.votes === a.votes) {
    return new Date(b.suggestedDate) - new Date(a.suggestedDate)
  }

  return b.votes - a.votes

})

console.log(things);

Also, take a look at this related question that @John mentioned

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