Here's an other way around based on swapping elements:
on revert theList
nb = theList.count()
repeat with i = 1 to nb/2
tmp = theList[i]
theList[i] = theList[nb+1-i]
theList[nb+1-i] = tmp
end repeat
end
This one using just one list: memory economy and is faster than colin's (for
a list of 10 elements, Colin's algorithm is doing 20 operations, mine's
doing only 15).
Your choice depends on the size of your list. For a big list, you should use
an optimized way.
regards,
Laurent
> -----Original Message-----
> From: Tab Julius [mailto:[EMAIL PROTECTED]]
> Sent: 8 f�vrier, 2002 10:21
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: Re: <lingo-l> turning a list back to front
>
>
>
> Hmmm... there are a couple of ways.
>
> Here's one which involves inserting before the first element:
>
> srcList =[1, 2, 3, 4, 5, 6]
> revList =[]
> repeat with thisEntry in srcList
> addAt(revList, 1, thisEntry)
> end repeat
>
>
> Another is counting backward and adding in, but the above one
> should do you
> just fine.
>
> - Tab
>
>
>
> At 03:15 PM 2/8/02 +0100, Heike Schmidt wrote:
> >hello everyone,
> >
> >i'm a relative newbie to this list, so please dont get mad
> if this seems a
> >bit pedestrian.
> >
> >here's my question:
> >is there a simpler way of turning a list back to front than
> something like
> >this (the first value needs to be the last and vice versa)?
> is there some
> >sort of "swop around" command that i just haven't found yet?
> >list = [1, 2, 3, 4, 5, 6]
> >oldlist = duplicate(list)
> >newlist = []
> >counter1 = list.count
> >
> >repeat with counter2=1 to list.count
> >newlist[counter2] = oldlist[counter1]
> >counter1 = counter1 - 1
> >end repeat
> >
> >
> >thank you very much,
> >heike .-)
> >
> >------------------------------------------------------------
> >
> > heike schmidt
> >
> > gekko mbh
> > rathausallee 10
> > 53757 sankt augustin
> > germany
> >
> > fon 02241 - 944 97 39
> > fax 02241 - 94497 33
> > web www.gekko.de
> >
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> [EMAIL PROTECTED]). Lingo-L
> >is for learning and helping with programming Lingo. Thanks!]
>
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