3 ms·

> I need it. Need is a strong word.

• callahad 11y ago
  In this case, "need" refers to the "if (x === undefined) { x = y }" pattern. Which is absolutely a need when implementing functions with variable arity. If I need that pattern, I'd rather write it declaratively than imperatively. :)
  • zeckalpha 11y ago
    Variable arity is exactly the thing to which I refer. It isn't needed.