javascriptperformancedojo

Get max and min of object values from JavaScript array

What is the best way to get the maximum and minimum values from a JavaScript array of objects?

Given:

var a = [{x:1,y:0},{x:-1,y:10},{x:12,y:20},{x:61,y:10}];
var minX = Infinity, maxX = -Infinity;
for( var x in a ){
  if( minX > a[x].x )
     minX = a[x].x;
  if( maxX < a[x].x )
     maxX = a[x].x;
}

Seems a bit clumsy. Is there a more elegant way, perhaps using dojo?

Solution

  • Use this example

    var lowest = Number.POSITIVE_INFINITY;
var highest = Number.NEGATIVE_INFINITY;
var tmp;
for (var i=myArray.length-1; i>=0; i--) {
    tmp = myArray[i].Cost;
    if (tmp < lowest) lowest = tmp;
    if (tmp > highest) highest = tmp;
}
console.log(highest, lowest);