How to properly sort an array of objects?

Question

JavaScript

There is an array:

cities = [
    {city: "Артёмовск", population: 1688},
    {city: "Ачинск", population: 105259},
    {city: "Боготол", population: 19819},
    {city: "Бородино", population: 16061},
    {city: "Дивногорск", population: 29195},
    {city: "Дудинка", population: 21015},
    {city: "Енисейск", population: 17805},
    {city: "Железногорск", population: 83857},
    {city: "Заозёрный", population: 10286},
    {city: "Красноярск", population: 1095286}
    ];

You need to sort it alphabetically, but put the city with the highest population value in the first place.

I try like this:

function sortData(arr) {
        const max = arr.reduce((prev,cur) => +cur.population > +prev.population ? cur: prev);  //нахожу город с максимальным населением
        const maxIndex = arr.findIndex(item => item.city === max.city); //нахожу индекс этого объекта в массиве
        arr.splice(maxIndex, 1);  // вырезаю его
        arr = arr.sort((a, b) => a.city.toLowerCase() - b.city.toLowerCase());  // провожу сортировку по алфавиту
        arr.unshift(max);  // вставляю в начало город с максимальным населением
        return arr;
    }

The function works, but it seems to me that I'm missing something...
Is it possible to raise the city with the maximum population somehow simpler (perhaps at the sorting stage) and bypass finding the maximum element, cutting and pasting it?

Answer 1

function sort([...arr]) {
  const max = arr.reduce((max, n) => max?.population > n.population ? max : n, null);
  return arr.sort((a, b) => a === max ? -1 : b === max ? 1 : a.city.localeCompare(b.city));
}