Solved: how to randomly sort an array javascript

The main problem with randomly sorting an array is that it can be very time-consuming.

 arrays sorting random

I have an array of objects that I need to randomly sort.  The objects have a property called "order" that is a number.  I need to sort the array so that the order property is in random order, but the other properties of each object stay in place.  How can I do this?


A:

You can use <code>sort</code> with a function that returns a random value:


<code>const arr = [
  { id: 1, name: 'foo' },
  { id: 2, name: 'bar' },
];
arr.sort(() =&gt; Math.random() - 0.5);
console.log(arr);</code>

Arrays and sort functions

An array is a collection of data that can be accessed using an index number. The first element in the array is at index 0, the second element is at index 1, and so on. To access the third element in the array, you would use the index number 3.

To sort an array, you can use a sort function. The sort function takes two arguments: an array and a comparison function. The comparison function compares two elements in the array and returns a boolean value. If the comparison function returns true, then the element at position x in the array will be placed before the element at position y in thearray. If the comparison function returns false, then the element at position x inthearray will be placed aftertheelement at position y inthearray.

Here is an example of how to use a sort function to sort an array of numbers:

var numbers = [1, 2, 3, 4]; // Sort numbers using a comparer function var sortedNumbers = numbers .sort(function(a, b) { return a – b; }); // Print out sortedNumbers console .log(sortedNumbers);

Random Arrays

An array is a collection of data that can be accessed using an index number. In JavaScript, arrays are created using the Array constructor.

To create an empty array, use the Array() constructor:

var myArray = new Array();

To create an array with five elements, use the following code:

var myArray = new Array(5);

myArray[0] = “JavaScript”; myArray[1] = “Arrays”; myArray[2] = “Functions”; myArray[3] = “Strings”; myArray[4] = “Booleans”; myArray[5] = “Numbers”;