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Comment by tragic | Hacker News Reader

That's an extraordinarily reductive view of improvements to a programming language. A basic example: cleaner syntax for anonymous functions will have (presumably) almost no effect on speed/memory either which way, but will make code more readable. Which is not a 'hipster' concern.

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It's the difference between

  var map = function (f) {
    return function (list) {
      return list.map(f);
    };
  };

and

  const map = f => list => list.map(f);

Also: "this" is bound for you in fat arrow functions without having to resort to function.prototype.bind or "var that = this;" trickery. That's an issue I've seen bite many people before and it'll be nice to have an easy way to avoid that.

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