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[Johnny]

BCS Wrote:

> Johnny wrote:
> > BCS Wrote:
> >>Johnny wrote:
>  >>
> >>>foreach (m; a.keys) {
> >>>  if ( b[m] ) {
> >>>   writefln("%s %s %s", m, a[m], b[m])
> >>>  }
> >>>  else {
> >>>    writefln("%s %s", m, a[m])
> >>>  }
> >>>}
> >>
> >>foreach (k, v1; a) {
> >>   if ( auto v2 = k in b )	// is this what your looking for?
> >>    writefln("%s %s %s", k, v1, *v2)
> >>   else
> >>    writefln("%s %s", k, v1)
> >>}
> > 
> > A good hint. my problem is that I get an ArrayBounds error if i try it with my method.
> > ... an I can't catch it
> 
> The "/a/ in /b/" construct fixes that. Just looking up the value should 
> do what you described if the value isn't their.

I've tested it, and yes thank you very much it works fine!
.. but still don't really understand what "auto v2 = m in b" means
something like v2 = b.keys ?