Checking if a string is null

[Bruno Medeiros]

Manfred Nowak wrote:
> Bruno Medeiros wrote
> 
>> (What made you do that in the first place?)
> 
> Because arrays should approximately form a mathematical Kleene Algebra 
> at the semantical level. These have two different neutral elements 0 
> and 1, so that concatenation and 1 are required to form a monoid.
> 
> 

I dont' get it, in D's arrays, what are the neutral elements 0 and 1? A 
zero length, and a one-length array, respectively? Or something else? 
And how can there be two different neutral elements?


-- 
Bruno Medeiros - MSc in CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D