JuniorTheoryCommon

What does the program print?

JavaScript

const nums = [10, 9, 1];
nums.sort();
console.log(nums.join(" "));

1 10 9

Expecting 1 9 10: without a function sort compares elements as strings, and the string "10" comes before "9" because "1" is less than "9".
Expecting 10 9 1: sort changes the array it is called on, so nums itself is sorted; only toSorted leaves the original alone.

JuniorTheoryCommon

JavaScript

const nums = [10, 9, 1];
nums.sort();
console.log(nums.join(" "));

1 10 9

Expecting 1 9 10: without a function sort compares elements as strings, and the string "10" comes before "9" because "1" is less than "9".
Expecting 10 9 1: sort changes the array it is called on, so nums itself is sorted; only toSorted leaves the original alone.