[Newbies] closed and open interval
cdrick65 at gmail.com
Mon Nov 24 17:40:48 UTC 2008
Thanks all for these answers... I should have precised I knew about
Interval ;) But you answered all and more. I wanted to be sure they
were no existing implementation of it.
I was also imaginating an implementation of a special kind of interval
(closed + open ends). I have some questions:
- does Interval is a good starting point
to me it looks like a closed interval but is not because there's a
step between the values which is one by default, so :
(0.0 to: 1.0) includes: 0.5 "false"
I'd like (0 to: 1) beRightOpen includes: 0.4356456 -> true...
(0 to: 1) beRightOpen includes: 1 "false"
and I'd also like (this is the original motivation):
(0 to: 1) by 0.25 equivalent to: # ( [0 0,25[ [0 0,5[ [0
0,75[ [0 1] )
Would you use Interval or create another class (distinct, super, sub...) ?
Thanks for all,
as an extra question, I wonder what has to be done (if possible) to
change the scanner so that:
[1 2] creates an interval... it shouldn't be recognized as a block
because there's only number inside... maybe it would be difficult to
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