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Re: dereference syntax

by OM_Zen (Scribe)
on Feb 26, 2003 at 19:55 UTC ( #238893=note: print w/ replies, xml ) Need Help??

in reply to dereference syntax

Hi ,

# The $x is a hashreference and here : my $ones = {}; $ones{a}={b=>1}; print "[$ones{a}]\n"; print "[$ones->{a}]\n"; print "[$ones{a}->{b}]\n"; print "[$ones{a}{b}]\n"; __END__ [HASH(0xe01d8)] [] [1] [1]

$x->{a} is not the same as $x{a}

( $x->{a} will be a lookup of the key of a hashrefernce (the declaration in the above my $ones = {} kind of decalaration available ),

$x{a} will be a lookup of the key of %x)

$x{a}->{$b} is the same as $x{a}{$b}

Please read the perldoc perldsc for all kinds of data structure decalaration definition and access

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