+1 on ... (spread) exhausting an iterator to expand the iterated values
into positional parameters or initialisers.
/be
Mark S. Miller wrote:
On Tue, Feb 14, 2012 at 12:23 PM, Andrea Giammarchi
<andrea.giammar...@gmail.com <mailto:andrea.giammar...@gmail.com>> wrote:
nope, Set does not even accept arguments as it is now ... does it ?
Not now. But this thread suggests changing it to do so. I think I
agree but don't yet have a strong opinion about whether Set should
have a single iteratable parameter or a rest parameter of the
individual elements.
Relevant question: What should spread (... in a call expression) do
when its operand is an iterator or iteratable? Currently spread simple
treats its operand as array-like, in which case I think perhaps Set
should stick with a single parameter. If we can generalize spread to
enumerate the values obtained from an iterator, then I think perhaps
Set should go with the spread parameter.
Whatever we decide for Set should also guide what we do for Map and
WeakMap of course.
On Tue, Feb 14, 2012 at 9:20 PM, Dean Landolt
<d...@deanlandolt.com <mailto:d...@deanlandolt.com>> wrote:
On Tue, Feb 14, 2012 at 3:07 PM, Andrea Giammarchi
<andrea.giammar...@gmail.com
<mailto:andrea.giammar...@gmail.com>> wrote:
if you accept a single argument, of course, but what if
you Set(..[1, 2, 1]) then ?
`Set(1, 2, 1)` then? Are you suggesting this should throw? So
you'd need to dedupe your arguments before you construct a set
with them? Isn't that a primary use case of sets?
magic add through Set constructor does not sound good to me
On Tue, Feb 14, 2012 at 8:27 PM, Peter Michaux
<petermich...@gmail.com <mailto:petermich...@gmail.com>>
wrote:
On Tue, Feb 14, 2012 at 12:09 AM, Andrea Giammarchi
<andrea.giammar...@gmail.com
<mailto:andrea.giammar...@gmail.com>> wrote:
> thinking about the add behavior, where no duplicated
values will be added,
> this argument may cause some logic headache anyway
>
> Set([1, 2, 1]) what should happen ?
I think that should be a set with one element. The
element is an array
of length three.
Peter
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--
Cheers,
--MarkM
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