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    // inspiration: https://stackoverflow.com/a/3943023/558780

    // wc3 approach
    public static func favorsDarkForeground(_ bgColor: UIColor) -> Bool {
        
        if let rgb = bgColor.rgb() {
            
            var uicolors: Array<Float> = [Float(rgb.red) / 255, Float(rgb.green) / 255, Float(rgb.blue) / 255];
            var c = uicolors.map({ (uicolor) -> Float in
                if (uicolor <= 0.03928) {

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import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    
    // object with computed property
    var Parent = Ember.Object.extend({
      fullName: Ember.computed('first', 'last', function() {
        return `${this.get('first')} ${this.get('last')}`;
      })

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// blend in with background, less visually jarring than native
$scrollbar-size: 7px;
::-webkit-scrollbar {
  background-color: $background-color;
  width: $scrollbar-size;
  height: $scrollbar-size;
}

::-webkit-scrollbar-thumb {
  background:#999;

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import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  actions: {
    greet: function(friend) {
      window.alert(`Hello, ${friend}!`);
    }
  }
});

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import Ember from 'ember';

export default Ember.Route.extend({
  model: function() {
    return 'Sandwich';
  }
});

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var recursiveReplaceKey = function(object, oldKey, newKey) {
  for (var key in object) {
    if (object.hasOwnProperty(key)) {
      if ($.isPlainObject(object[key])) {
        // recurse to sub-object
        util.recursiveReplaceKey(object[key], oldKey, newKey);
      }

      if (key === oldKey) {