Re: syntax of multidimensional arrays and hashes

"I am converting a hash of arrays to an array of arrays.
I can access the array in the hash as an array. but not its individual elements.
I'm sure that's because I don't understand the syntax."

I agree with that!

foreach $thread (keys %threads) 
{
  print "thread=$thread, values are ". @{$threads($thread)}."\n ";
}
[download]

Past that, I don't understand the context of what you are trying to accomplish. The rest looks like "mumbo-jumbo" to me. Sorry that I don't understand, but I just don't.
$tsize[$tnum] = @{$threads{$thread}};
is nonsense.

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Re^2: syntax of multidimensional arrays and hashes by LanX (Saint) on Jul 18, 2009 at 04:58 UTC
Sorry that I don't understand, but I just don't. `$tsize[$tnum] = @{$threads{$thread}};` is nonsense. Well syntactically it's correct %threads is a HoA, so @tsize is supposed to hold the sizes of these (now indexedą) arrays. I agree that it's hard to imagine why to store the sizes statically... Cheers Rolf (1) Well should be noted that $tnum is initialized but never incremented... :-)	[reply] [d/l]
Re^3: syntax of multidimensional arrays and hashes by Marshall (Canon) on Jul 18, 2009 at 05:17 UTC
The weird part here is that `$tsize[$tnum]` has pretty much no useful meaning in the code. In a list context, @{$threads{$thread}} has all the values in $threads{$threads}. In a scalar context @{$threads{$thread}} is the number of things in the @{$threads{$thread}} list. `$tsize[$tnum] = @{$threads{$thread}};` doesn't appear to have any real meaning or usefulness. use @{$threads{$thread}} instead of trying to assign a scalar value to a 'C' style @tsize array.	[reply] [d/l] [select]
Re^4: syntax of multidimensional arrays and hashes by hsfrey (Beadle) on Jul 19, 2009 at 04:43 UTC
I'm going to use @tsize a lot later, eg: to sort all the arrays, so I wanted to access it easily in parallel with the other arrays. And Yes, you've outed me! <G> I'm really a C programmer at heart! It'll take a while before I start thinking in Perl. In any case, $tsize is unrelated to my problem of being unable to retrieve the elements of the array members of the hash.	[reply]
Re^3: syntax of multidimensional arrays and hashes by hsfrey (Beadle) on Jul 19, 2009 at 04:37 UTC
Rolf: >should be noted that $tnum is initialized but never incremented< Yes it is - I just cut it off when copying the code to post it this time. It's there in the full code I posted previously.	[reply]
Re^2: syntax of multidimensional arrays and hashes by hsfrey (Beadle) on Jul 19, 2009 at 04:33 UTC
$tsize$tnum = @{$threads{$thread}}; # number of items in the thread Ah, the beauty of Perl! It looks like nonsense, but it works <G> $threads{...} is the hash $thread is the key of the hash $threads{$thread} is the value for that key, which is an array Putting the @ in front of the array returns the size of the array. And, that's is what is correctly printed out. It's one of the FEW things I did correctly! <G>	[reply]
Re^3: syntax of multidimensional arrays and hashes by hsfrey (Beadle) on Jul 19, 2009 at 06:40 UTC
VOILA! THIS WORKS! `$tnum=0; foreach $thread (keys %threads) { $tsub[$tnum] = $thread; $tsize[$tnum] = @{$threads{$thread}}; print "\n\ttsize[tnum]= @tsize[$tnum]"; #dbg for ($i=0; $i<$tsize[$tnum] ; $i++) { $tlist[$tnum][$i] = $threads{$thread}[$i]; print "\n\t{threads{thread[$i]}}= $threads{$thread}[$i]"; print "\n\tt +list[$tnum][$i]= $tlist[$tnum][$i]"; #dbg } $tnum++; } }` [download] I had an extra ${...} around the assignment statement in the inner loop! Thanks to all who made suggestions! Harvey	[reply] [d/l]