Rosetta Commatizing numbers

[Solomon E via Digitalmars-d-learn]

On Wednesday, 31 May 2017 at 15:44:51 UTC, Ivan Kazmenko wrote:
....
>
> So, two custom calls, two minor changes, no sweat.  Is 
> everything right now?  Even if not: that was fast, we can do 
> another iteration.  When we have a short readable solution with 
> no special cases, the first few changes are going to be easy.
>
....
>
> Ivan Kazmenko.

I followed that advice, and found and fixed more bugs that were 
lurking in the original and in my complications. When the number 
begins with a decimal point, that's an edge case none of the 
earlier versions were handling right. I added a regression test 
for that.

I just posted my latest version at Rosetta, without the 
unnecessary complications. I hope you like it better.

http://rosettacode.org/wiki/Commatizing_numbers#D

(The complications weren't totally useless though. Without trying 
the complications, I wouldn't have tested enough to make as much 
improvement as I have. Overcomplicated features are something to 
avoid releasing, except in a repo folder of extras for other 
programmers to try fiddling with, and Rosetta code isn't exactly 
that.)