size of an IO list
Fri Mar 4 00:01:21 CET 2005
I have also wished for this many times.
I often find myself going to extraordinary lengths to add up the total
length in the same pass as creating some complex io_list. This makes
for horrible code.
asn.1 encoding would also benefit greatly.
So Yes Please!
(from a paying customer :-) )
On 3 Mar 2005, at 08:14, Raimo Niskanen wrote:
> lists:flatlength/1 works on a deep list of numbers, but not if the
> list contains binaries, nor if the list or one of its sublists
> is an improper list with a binary at the tail, as allowed for
> I/O lists.
> luna@REDACTED (Daniel Luna) writes:
>> On Wed, 2 Mar 2005, Joe Armstrong (AL/EAB) wrote:
>>> How about a BIF to compute the size of an I/O list?
>>> I have made a deep list that I want to output (guess what's it's
>>> HTML :-)
>>> I need to make an HTTP header element "Content-Length: ..."
>>> Which is the size of the flattened deep list , but I don't want to
>>> flatten it (horrors)
>>> or traverse it (in Erlang) to find the length.
>>> Suitable case for a BIF?
>> There is lists:flatlength/1 that does this, unfortunately it's not a
>> Daniel Luna | Top reasons that I have a
>> luna@REDACTED | a) Laziness.
>> http://www.update.uu.se/~luna/ | b) I can.
>> Don't look at my homepage (it stinks).| c) I can get away with it.
> / Raimo Niskanen, Erlang/OTP, Ericsson AB
More information about the erlang-questions