js order array by value code example

Example 1: how to sort an array by value in javascript

//ascending order
arr.sort(function(a, b){return a-b});
arr.sort((a, b) => a - b);
//descending order 
arr.sort(function(a, b){return b - a});
arr.sort((a, b) => b - a);

Example 2: sort array of objects javascript by value

let orders = [
  { 
    order: 'order 1', date: '2020/04/01_11:09:05'
  },
  { 
    order: 'order 2', date: '2020/04/01_10:29:35'
  },
  { 
    order: 'order 3', date: '2020/04/01_10:28:44'
  }
];


console.log(orders);

orders.sort(function(a, b){
  let dateA = a.date.toLowerCase();
  let dateB = b.date.toLowerCase();
  if (dateA < dateB) 
  {
    return -1;
  }    
  else if (dateA > dateB)
  {
    return 1;
  }   
  return 0;
});

console.log(orders);

Example 3: sort js array array

var ages = [18, 21, 9, 41, 35, 24]
ages.sort(function(a, b) {
  return a - b
})
// => [9, 18, 21, 24, 35, 41]