Re: ADA.STRINGS.INDEX_ERROR : a-strunb.adb:782

[Shark8 <onewingedshark@gmail.com>]

On Monday, January 15, 2018 at 5:00:21 AM UTC-7, Mehdi Saada wrote:
> That's an awful lot of things at once x_x, but thanks. So in linux I have to go past the "./doinstall" script, right... Never used specific compilation option for anything until now.
> 
> > When deleting elements of a list by position the loop must run positions 
> >in reverse: 
> >[...]
> >That will keep the positions straight. Position /= index, BTW. 
> >However, deleting characters from a string almost never has sense. You 
> >probably should reconsider the algorithm.
> 
> Ah ? Why so ? And how come position =/ index ? "IND" is the same, isn't ? Performance consideration ? But fine, I'll do without.

The reason position isn't index can be simply illustrated with the following array:
  Example : Array( 11..15 ) of Boolean := (True, False, False, True);

In the above, position #1 is True, #2 & #3 are False, and #4 is True.
HOWEVER, position #1 is index 11, #2 is index 12, etc.
(There's also Offset, which is actually why C programmers seem to be enamored with 0-based indexing; but it only shows they conflate index, position, and offset.)