* Re: Order of modifiers and flags in parameter expansion
2005-03-18 16:02 ` Order of modifiers and flags in parameter expansion Bart Schaefer
@ 2005-03-18 16:09 ` Peter Stephenson
0 siblings, 0 replies; 2+ messages in thread
From: Peter Stephenson @ 2005-03-18 16:09 UTC (permalink / raw)
To: zsh-workers
Bart Schaefer wrote:
> [> zsh-workers]
>
> On Mar 18, 11:08am, Peter Stephenson wrote:
> } Subject: Re: Order of modifiers and flags in parameter expansion
> }
> } +item(tt(10.) em(Uniqueness))(
> } +item(tt(11.) em(Ordering))(
>
> That's funny. Why do it in that sequence? Seems like (a) it doesn't
> matter to the end result [unless there's a 10.5 that's still not
> documented], and (b) it would be more efficient to remove duplicates
> after sorting than before.
A possible clue is the intervening bit I missed out, which checks if
there's still an array after making it unique and if not handles a
single element. Sorting doesn't affect this. You can't rely on the
list being sorted, so it must handle any combination. I doubt it makes
that much difference in practice; the typical uses for unique lists
that I can think of aren't ordered.
--
Peter Stephenson <pws@csr.com> Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK Tel: +44 (0)1223 692070
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