undefined being treated as a missing optional argument

Sam Tobin-Hochstadt samth at ccs.neu.edu
Fri Apr 13 15:42:54 PDT 2012

On Fri, Apr 13, 2012 at 5:42 PM, Brendan Eich <brendan at mozilla.org> wrote:
> Sam has similar testimony from Racket (neé PLT-Scheme).

Very much so -- I've encountered places where Racket's semantics for
keyword arguments (which is similar to what Allen proposes for ES6)
ends up causing the entire set of keyword arguments to be propagated
back up the chain and provided in full at every call site.
sam th
samth at ccs.neu.edu

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