Helpful map, reduce, filtering data

gistfile1.txt

const prizesArr = [{id:1, value: "100"}, {id:2, value: "10"}, {id:3, value: "100"}];
let values = [] as string[];
// This checks for the highest occurence of the property value in each prize.
// They're wont be any higher than 3, and this 3x occurence is the prize
// amount that's passed to the promotionTriggerOptIn function
return prizesArr
    .reduce((prev, curr) => { prev.push(curr.value); return prev; }, values = [])
    .sort((a, b) => values.filter((v) => v === a).length - values.filter((v) => v === b).length)
    .pop();
    
// '100'