arrow function syntax simplified

[Kevin Smith]

>
> Object.getOwnPropertyNames(Math).forEach((key) => {
>  if (typeof Math[key] === 'function') Number.prototype[key]= () =>
> Math[key](this);
> });
>

Hi Jorge,

Here you are defining a method, for which arrows are inappropriate.
 Long-hand functions are appropriate in this case.

    Object.getOwnPropertyNames(Math).forEach(key => {
        if (typeof Math[key] === "function")
            Number.prototype[key] = function() { return Math[key](this); };
    });

No one's attempting to deprecate long-hand functions.  Arrow functions fill
a different need.

kevin
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