NULL cannot be in an integer or numeric vector so it would not be a good
fit for substring's 'first' or 'last' argument (or substr's 'start' and
'stop'). Also, it is conceivable that string lengths may be 64 bit
integers in the future, so why not use Inf as the default? Then the
following would g
Thanks all, great points well taken. Indeed it seems the default of
100 predates SVN tracking in 1997.
I think a NULL default behaving as "end of string" regardless of
encoding makes sense and avoids the overheads of a $ call and a much
heavier nchar() calculation.
Mike C
On Mon, Jun 21, 202
> Tomas Kalibera
> on Mon, 21 Jun 2021 10:08:37 +0200 writes:
> On 6/21/21 9:35 AM, Martin Maechler wrote:
>>> Michael Chirico
>>> on Sun, 20 Jun 2021 15:20:26 -0700 writes:
>> > Currently, substring defaults to last=100L, which
>> > strongly suggests t
On 6/21/21 9:35 AM, Martin Maechler wrote:
Michael Chirico
on Sun, 20 Jun 2021 15:20:26 -0700 writes:
> Currently, substring defaults to last=100L, which
> strongly suggests the intent is to default to "nchar(x)"
> without having to compute/allocate that up front.
> Michael Chirico
> on Sun, 20 Jun 2021 15:20:26 -0700 writes:
> Currently, substring defaults to last=100L, which
> strongly suggests the intent is to default to "nchar(x)"
> without having to compute/allocate that up front.
> Unfortunately, this default makes no
