note wdef2 That <code>@x[@f]=@f</code> had me puzzled for a while, but it seems it is the same as:<br></br> <code>@x[(@f)]=(@f)</code><br></br> So just @f is always expanded into a list without (), and () is not necessary when defining an array from a list?<br></br> I'm still looking at the next one. 663473 663719