What does using "{}" mean, in this context?

Question

I found this line very confusing:

return new int[] {};

Are the two curly brackets referencing something in memory? Here's the full code:

class Solution {
    public int[] twoSum(int[] nums, int target) {
        HashMap<Integer, Integer> prevMap = new HashMap<>();

        for (int i = 0; i < nums.length; i++) {
            int num = nums[i];
            int diff = target - num; //En diff, iremos restando el num al Objetivo

            if (prevMap.containsKey(diff)) { 
                return new int[] { prevMap.get(diff), i };
            }

            prevMap.put(num, i);
        }

        return new int[] {};
    }
}

That's just the shortcuts syntax [to create an array](https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html). An empty array in this case. And `new int[] {1, 2, 3}` would create an array containing those 3 integers. — OH GOD SPIDERS, Aug 11 '23 at 14:32
Aah thanks so much @OHGODSPIDERS , kinda figured it out after asking lmao but understood perfectly now! — SleepyProgrammingN0ises, Aug 11 '23 at 14:36

Lore · Answer 1 · 2023-08-11T14:39:07.057

0

It simply returns an empty int array as function output.

edited Aug 11 '23 at 14:39

answered Aug 11 '23 at 14:33

Lore

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No, it returns an empty `int` array. Not an `Integer` array. – Kayaman Aug 11 '23 at 14:37
1

Thanks! I thought it had something to do with the prevMap variable, but turns out it was a lot simpler... smh – SleepyProgrammingN0ises Aug 11 '23 at 14:38
@user21311461 you're welcome – Lore Aug 11 '23 at 14:40

What does using "{}" mean, in this context?

1 Answers1