Claude Pache wrote:
But I think that clarity can be improved by avoiding to obscure the intent by
computation details. For my personal polyfill, I have found useful to abstract
out the following steps, used (with slight variations) thrice in
`Array.prototype.copyWithin` and twice in `Array.prototype.fill`, (and which
can be used for various other methods of `Array.prototype`):
IndexFromRelativeIndex(`k`, `len`, `default`)
+1
Nit: How about just FromRelativeIndex for the name?
/be
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