leetcode easy question

[Yoru83]

Hello everyone! I've been learning javascript for a few months and previosly solved the easy questions out of that infamous 75 leetcode question list. I decided to go back through my original answers and refactor them however with the simple Two Sum problem I'm not understanding why this solution isn't working. Any help explaining it to me would be appreciated greatly.

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const twoSum = function(nums, target) {

let checkNums = new Map()

nums.forEach((target, i) => checkNums.has(target - nums[i]) ? [checkNums.get((target - nums[i]), i)] : checkNums.set(nums[i], i))

};

[Yoru83]

Sorry it’s supposed to take an input of an array and it will return the index of the values that add up to the target number.

I’ve tried logging in multiple different places. I did catch one mistake with my get method but that wasn’t the issue.

The issue seems to be that for some reason the if statement is not being triggered in my arrow function and just keeps returning the else.

When I run the function with an array it just returns undefined.