Sort an array of objects by property of second element in javascript

Question

Searching many examples I didn't manage to solve my case. I have an array that should be sorted by author. My attempt did nothing. What is the right expression?

var array = [
  ["ifke", {
    "title": "secure",
    "author": "admin"
  }],
  ["lottery", {
    "title": "The lo",
    "author": "anton"
  }],
  ["short-content", {
    "title": "Short Content",
    "author": "scott"

  }],
  ["ziddler", {
    "title": "The Fiddler",
    "author": "herman"

  }]
];


array.sort((a, b) => a[1].author - b[1].author)
console.log(array)

Ok before even attempting to answer, may I ask why your data is structured that way? It's awful. Because if this isn't just homework assignment, then I'd strongly advice re-thinking the way you store data — Samuel Hulla, Jul 07 '20 at 14:08
Try `array.sort((a, b) => a[1].author.localeCompare(b[1].author))` — User863, Jul 07 '20 at 14:09
Thanks for the advice. The data structure comes from an [import function loading markdown files into a JSON] (https://www.npmjs.com/package/markdown-to-json) object. Now my target is to return this sorted as described. — Fred, Jul 07 '20 at 15:00

Harmandeep Singh Kalsi · Answer 1 · 2020-07-07T14:13:54.613

A working solution using .sort method of an array and using localeCompare method to sort based on the strings

var array = [
 [ "ifke", {
    "title": "secure",
    "author": "admin"
  }],
  ["lottery", {
    "title": "The lo",
    "author": "anton"
  }],
  ["short-content", {
    "title": "Short Content",
    "author": "scott"
  
  }],
  ["ziddler", {
    "title": "The Fiddler",
    "author": "herman"

  }]
];

array.sort((a,b) => a[1].author.localeCompare(b[1].author));
console.log(array);

score 2 · Answer 2 · answered Jul 07 '20 at 14:13

2

You have the right idea, but you need to use a differet way of comparing. The subtraction operator on non-numeric strings always yields NaN, which is useless for comparison.

You could use localeCompare, which reutrns 1, 0, or -1:

array.sort((a, b) => a[1].author.localeCompare(b[1].author))

answered Jul 07 '20 at 14:13

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Dupe............ – mplungjan Jul 07 '20 at 14:17

Sort an array of objects by property of second element in javascript

2 Answers2