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Question 248 of 521

Part 4: Prototypes, Object Methods & Event Loop (174 - 253)

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JavaScript Internals (521 Qs)•Part 4: Prototypes, Object Methods & Event Loop (174 - 253)

What is the purpose of compareFunction while sorting arrays

The compareFunction is used to define the sort order. If omitted, the array elements are converted to strings, then sorted according to each character's Unicode code point value.

Let's take an example to see the usage of compareFunction,

javascript
  let numbers = [1, 2, 5, 3, 4];
  numbers.sort((a, b) => b - a);
  console.log(numbers); // [5, 4, 3, 2, 1]
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