Sort Array based on Object Attribute - Javascript [duplicate]

Question

I have an array of objects called canvasObjects.

Each object has an attribute called z.

I want to sort this array based on objects z. How do I do this using the sort() method?

Answer 1

You just need to pass in a comparator to the sort function

function compare(a,b) {
  if (a.attr < b.attr)
     return -1;
  if (a.attr > b.attr)
    return 1;
  return 0;
}

canvasObjects.sort(compare);

Or inline

canvasObjects.sort(function(a,b) {return (a.attr > b.attr) ? 1 : ((b.attr > a.attr) ? -1 : 0);} );

See this POST

Answer 2

Tried other answers posted here but then I found the following to work best.

Ascending :

canvasObjects.sort(function(a,b) { return parseFloat(a.z) - parseFloat(b.z) } );

Descending :

canvasObjects.sort(function(a,b) { return parseFloat(b.z) - parseFloat(a.z) } );