perl, how to build two dimensional array?

how to build two dimensional array?

Author	Message
Jim Shapi #1 / 2	how to build two dimensional array? Quote: >\|> Note also that Perl 5 has explicit support for multi-dimensional arrays >\|> (implemented as arrays of arrays (of arrays (of arrays...))): >\|> >\|> $table[3][1] = 10; >\|> $table[3][2] = 12; >\|> >\|> You can intermix numeric and string subscripts too: >\|> >\|> $table[2]{'dog'}[1] = 10; >\|> $table[2]{'cat'}[2] = 12; >\|> >\|> Larry > I tried this once, but ran into weird problems. Eg. I had >assignments like: > $host{$net}{$addr} = "nodename"; >and then wished to do something like: > foreach $n (keys %host) { # This was ok..,gave all $NET values > foreach $a (keys %host{$n}) { # Fails, as %host{$n} is illegal Try: foreach $a (keys %{host{$n}}) { ... ^ ^ Note additional {}'s Quote: >-- >The contents of this message may reflect my personal opinion. They are >not intended to reflect those of my employer, or anyone else. You didn't think Larry would really leave us high and dry with this one? Hope this helps. Jim
Sat, 17 Jan 1998 03:00:00 GMT

Michael J. St #2 / 2	how to build two dimensional array? Quote: > I tried this once, but ran into weird problems. Eg. I had >assignments like: > $host{$net}{$addr} = "nodename"; >and then wished to do something like: > foreach $n (keys %host) { # This was ok..,gave all $NET values > foreach $a (keys %host{$n}) { # Fails, as %host{$n} is illegal Not having easy access to perl5 right now I can't test this, but you don't get automagical dereferencing in perls o you have to be explicit e.g. foreach $net (keys %host) { foreach $addr (keys %{$host{$n}}) { but I could be horribly wrong :-) Hope this helps, Mike -- Mike Stok \| The "`Stok' disclaimers" apply. http://www.{filter}com.net/~stok/ \| The inevitable WWW page (?)
Sat, 17 Jan 1998 03:00:00 GMT

Page 1 of 1

[ 2 post ]