JavaScript sort

var companies = [

  {name: "AirBnb", year: 2005},

  {name: "Tesla", year: 2000},

  {name: "Google", year: 1995}

];

var sortedCompanies = companies.sort(function(item1, item2) {

	if (item1.year > item2.year) {

		return 1;

	} else {

		return -1;

	}

});

console.log(sortedCompanies); 

// [{name: "Google", year: 1995}, {name: "Tesla", year: 2000}, {name: "AirBnb", year: 2005}]

Alternative syntax with arrow function:

var companies = [

  {name: "Tesla", year: 2000},

  {name: "AirBnb", year: 2005},

  {name: "Google", year: 1995}

];

var sortedCompanies = companies.sort((item1, item2) => (item1.year > item2.year) ? 1 : -1);

console.log(sortedCompanies); 

// [{name: "Google", year: 1995}, {name: "Tesla", year: 2000}, {name: "AirBnb", year: 2005}]

Sort array of numbers:

var nums = [-1, -5, 3, 22];

var numsSortedWrong = nums.sort(); // Sorted as strings

console.log(numsSortedWrong); // [-1, -5, 22, 3]

var numsSorted = nums.sort((item1, item2) => item1 - item2);

console.log(numsSorted); // [-5, -1, 3, 22]