in reply to push
-
To use a reference, say $ref, you put {$ref}
in place of a variable name (not counting the $,
%, or @):
$scalar ${$sRef} @array @{$aRef} $array[0] ${$aRef}[0] $#array $#{$aRef} %hash %{$hRef} $hash{KEY} ${$hRef}{KEY} @hash{@list} @{$hRef}{@list}
-
If the reference is held in a simple scalar variable, then
the { and } can be dropped:
$scalar $$sRef @array @$aRef $array[0] $$aRef[0] $#array $#$aRef %hash %$hRef $hash{KEY} $$hRef{KEY} @hash{@list} @$hRef{@list}
-
If you are getting a scalar from a hash or array, then you
can replace ${$ref} with $ref->:
$array[0] $aRef->[0] $hash{KEY} $hRef->{KEY}
-
If the reference is in a hash or array, then you can drop
the -> between the adjacent [0]
and {KEY}:
${$aRef->[0]}[1] $aRef->[0]->[1] $aRef->[0][1] ${$aRef->[0]}{KEY} $aRef->[0]->{KEY} $aRef->[0]{KEY} ${$hRef->{KEY}}[1] $hRef->{KEY}->[1] $hRef->{KEY}[1] ${$hRef->{A}}{B} $hRef->{A}->{B} $hRef->{A}{B}
I hope that makes things much clearer.
- tye (but my friends call me "Tye")
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Replies are listed 'Best First'. | |
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Re: references quick reference (Re: push)
by a (Friar) on Apr 03, 2001 at 08:46 UTC | |
by tye (Sage) on Apr 05, 2001 at 00:52 UTC | |
Re: references quick reference (Re: push)
by malaga (Pilgrim) on Jan 31, 2001 at 00:17 UTC | |
by malaga (Pilgrim) on Jan 31, 2001 at 00:27 UTC |
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Seekers of Perl Wisdom