How about something like:
c := "["
every writes(c,!l) do c := ","
write("]")
less wasteful than the slice
David
>________________________________
> From: Clinton Jeffery <clint.jeff...@gmail.com>
>To: Robert Heckendorn <captainmeer...@gmail.com>
>Cc: Unicon group <unicon-group@lists.sourceforge.net>
>Sent: Sunday, March 9, 2014 7:48:18 PM
>Subject: Re: [Unicon-group] Some unicon code
>
>
>
>Robert,
>
>
>You are asking a classic Icon question, one so classic that any number of
>experts on the list might weigh in on the best solution. You are correct that
>l[2:0] creates a copy of (most of) l -- not a good thing if l is large.
>Instead of generating elements from a slice via
>!l[2:0]
>one can certainly generate the elements with
>l[2 to *l]
>
>
>Can anyone else suggest a shorter/cleaner formulation of Robert's writeany()
>procedure? Is there an IPL procedure that already does this?
>
>
>Cheers,
>Clint
>
>
>
>On Sat, Mar 8, 2014 at 10:24 AM, Robert Heckendorn <captainmeer...@gmail.com>
>wrote:
>
>The following can write out a list. I don't like doing the slice of the list
>because I am worried it builds a copy of the list. Any comments?
>>
>>procedure writeany(l)
>> every writes("[" |
>> l[1] |
>> ", " || !l[2:0] |
>> "]")
>> write()
>>end
>>
>>procedure main()
>> l := ["a", "b", "c"]
>> writeany(l)
>> pop(l)
>>
>> writeany(l)
>> pop(l)
>>
>> writeany(l)
>> pop(l)
>>
>> writeany(l)
>>
>> writeany("dogs")
>>
>>end
>>
>>--
>>
>>------------------------------------------------------------------------------
>>|
>>| "People would rather believe than know." -- E. O. Wilson
>>|
>>| Dr. Robert Heckendorn
>>| captainmeer...@gmail.com
>>| http://marvin.cs.uidaho.edu/~heckendo
>>| Computer Science Dept, Univ. of Idaho, Moscow, Idaho, USA 83844-1010
>>
>>
>
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