Javascript find max value in array of objects with key as argument, using reduce

gistfile1.txt

//find max value in array of objects with key as argument
function findMax(key) { 
  return function maxx(prev,curr) {
    return Math.max(prev, curr[key]);
  }
}

//then pass function to reduce with key as argument
//eg get max price from an array of objects
var maxPrice = array.reduce(findMax("price"),0);