adjustOrder.js

// This is Pseudocode
function adjustOrder(list):
    // Step 1: Adjust invalid values
    for each element in list:
        if element.order <= 0:
            element.order = null // Mark as "no order"

    // Step 2: Sort the list by 'order', moving null to the end
    sort list by:
        if a.order is null then return 1
        if b.order is null then return -1
        return a.order - b.order

    // Step 3: Assign consecutive values to the 'order' field
    currentOrder = 1
    for each element in list:
        element.order = currentOrder
        currentOrder = currentOrder + 1

    return list