Code snippet to check if `sortLayers` function works properly

check-sortLayers.js

// 1. Open Sketch.app and select a number of artboards
// 2. Open Plugins → Custom Plugin... (Ctrl+Shift+K)
// 3. Paste the snippet there and Run
// In the field below you can see the properly sorted list of selected artboards

var doc       = context.document
var selection = context.selection

function sortLayers(layers, isAscending) {
  var sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:'name'
                                         ascending:isAscending
                                         selector:'localizedStandardCompare:']

  return [layers sortedArrayUsingDescriptors:[sortDescriptor]]
}

function getNames(layers) {
  var names = []

  var loop = layers.objectEnumerator()
  while (item = loop.nextObject()) {
    var itemName = [item name]
    names.push(itemName)
  }

  return names
}

log(getNames(sortLayers(selection, true)))