AI solution for JavaScript Coding Question on BFE.dev
107. Find the largest difference

As an AI language model, I can provide you with an implementation of the function in JavaScript:

function largestDiff(arr) {
    if (arr.length < 2) {
        return 0;
    }
    let maxDiff = 0;
    let minVal = arr[0];
    for (let i = 1; i < arr.length; i++) {
        maxDiff = Math.max(maxDiff, arr[i] - minVal);
        minVal = Math.min(minVal, arr[i]);
    }
    return maxDiff;
}

Explanation:

• We start by checking if the input array has less than 2 elements. If it does, we return 0, as there can be no difference.
• We initialize a variable maxDiff to 0, which will hold the largest difference found so far.
• We also initialize a variable minVal to the first value of the array, which will hold the minimum value seen so far.
• We loop through the array from the second element (as we have already set minVal to the first element).
• For each element of the array, we calculate the difference between it and minVal, using arr[i] - minVal.
• If this difference is greater than maxDiff, we update maxDiff to this new value.
• If the current element is less than minVal, we update minVal to this new value.
• Finally, we return maxDiff, which will be the largest difference found.