math.max object javascript code example

Example 1: javascript array find highest value of array of objects by key

Math.max.apply(Math, array.map(function(o) { return o.y; }))

Example 2: javascript get array min and max

//get min/max value of arrays
function getArrayMax(array){
   return Math.max.apply(null, array);
}
function getArrayMin(array){
   return Math.min.apply(null, array);
}
var ages=[11, 54, 32, 92];
var maxAge=getArrayMax(ages); //92
var minAge=getArrayMin(ages); //11

Example 3: get object with max value javascript

let objects = [{id: 0, votes: 5}, {id: 1, votes: 3}, {id: 2, votes: 11}]

let maxObj = objects.reduce((max, obj) => (max.votes > obj.votes) ? max : obj);

/* `max` is always the object with the highest value so far. 
 * If `obj` has a higher value than `max`, then it becomes `max` on the next iteration.
 * So here:
 *  |  max = {id: 0, votes: 5},   obj = {id: 1, votes: 3}
 *  |  max = {id: 0, votes: 5},   obj = {id: 2, votes: 11}
 * reduced = {id: 2, votes: 11}
 */