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Postings from October 2001
Erik Lechak wrote: > 2) RFC 082: Arrays: Apply operators element-wise in a list context > (hyper operators) > and > 3) Special variable representing index of array in foreach structure > "$#" maybe (not in apocolypse3, I think) > Hi Eric. Thanks for your comments. Unfortunately it's a little early for detailed consideration of vector and matrix operations, which will be covered in more detail in a later Apocolypse. However, here's a couple of pointers from the RFCs that may appear in some form in Larry's later musings. First, check out: http://dev.perl.org/rfc/207.html This provides looping indices for multidimensional arrays. Please read RFCs 202-206 first though, since RFC 207 draws heavily on them. Next, note that hyper-operators are a bit smarter than the behaviour you indicate. Most notably, they 'broadcast' lower dimensionality structures to the highest dimensionality structure. We're only up to 1-dim structures in the Apocolypses so far, so for now that just means that @a = @b ^+ 1; works as it should. This is a more interesting issue when, for instance, broadcasting a vector across a matrix, but now I'm getting ahead of myself... Finally, note that there is an RFC which can simplify iteration through lists n-at-a-time: http://dev.perl.org/rfc/90.html So you can then pull the first element from each list with: my ($a,$b,$c) = merge(@a,@b,@c)Thread Previous