function myminmax(somearray) {
let
for (var i = 1, , i++)
}
return [min,max]
}
function findMinMax(arr) {
let min = arr[0].y, max = arr[0].y;
for (let i = 1, len=arr.length; i < len; i++) {
let v = arr[i].y;
min = (v < min) ? v : min;
max = (v > max) ? v : max;
}
return [min, max];
}