Re: [slang-users] Range array docs

[Duke Normandin <dukeofperl@xxxxxxxxxxx>]

On Wed, 21 Nov 2012 07:08:35 +0100
Manfred Hanke <Manfred.Hanke@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi Duke,
> 
> > I [...] couldn't find any mention of using the # prefix.
> 
> Two paragraphs above the example you're citing,
> http://www.jedsoft.org/slang/doc/html/slang-11.html says: "a
> range-array expressed in the form [a:b:#n] represents an array of
> exactly n elements running from a to b inclusive. It is
> equivalent to a+[0:n-1]*(b-a)/(n-1)."
> 
> That is,
> 	[0 : 100 : 25]
> is an array from exactly 0 to (in this case) 100, in steps of
> exactly 25 whereas
> 	[0 : 100 : #5]
> is an array from exactly 0 to exactly 100, with exactly 5
> elements.
> 
> Note that the array
> >      [first-value : last-value : increment]
> may or may not include `last-value'. (See the docs for the
> details.) For example, [0 : 100 : 25] == [0 : 123 : 25], because
> 100 + 25 > 123. Therefore, one has to be especially careful with
> non-integer valued range arrays like [0 : 1 : .25] -- which is
> probably [0., .25, .5, .75].


Hi Manfred  ....

Of course:


> "a range-array expressed in the form [a:b:#n] represents an array
> of exactly n elements running from a to b inclusive.

lol ... I should NEVER study docs late at night. 

The # sign prefixes the total elements required in the array

Thanks

--
Duke