Created
          August 2, 2016 17:49 
        
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  | function MyCat(name) { | |
| this.catName = name; | |
| } | |
| MyCat.prototype.sayCatName = () => { | |
| console.log(this === window); // => true | |
| return this.catName; | |
| }; | |
| var cat = new MyCat('Mew'); | |
| cat.sayCatName(); // => undefined | 
  
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