Why Record Types can be annoying in JS / TS

example.ts

// let's say I want to find the most occurring year here
const years = [1999,1993, 1992, 1991, 1991, 1999, 1993, 1993]

// I can use a Record<number, number> to create a map like so
// {1999: 2, 1993: 3, 1992: 1, 1991: 2, }

const yearMap: Record<number, number> = {}

for(let year of years){
   if(year in yearMap){
    yearMap[year] += 1
   } else {
    yearMap[year] = 1
   }

}

// Now if I want to iterate over the object to find find the max occurring year
// All the conversions turn the keys into strings

console.log(Object.keys(yearMap)) // ["1991", "1992", "1993", "1999"] instead of [1991, 1992, 1993, 1999]





// Just to solve the problem for funziesm, feel free to ignore

const entries = Object.entries(yearMap)

let maxEntry = entries[0] || null

for(let currEntry of Object.entries(yearMap)){
    if(!currEntry || currEntry[1] > maxEntry[1]){
       maxEntry = currEntry
       continue
    }
}

console.log(maxEntry[0])