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Re^4: Data Structures

by YYCseismic (Beadle)
on May 02, 2008 at 19:42 UTC ( #684243=note: print w/replies, xml ) Need Help??

in reply to Re^3: Data Structures
in thread Data Structures

I'm not sure I understand the difference with your correction. Why is it supposed to be
my( $x, $y, $z ) = @{ $line[000301038][1261] };
rather than without the @{...} around the $line[...][...]?

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Re^5: Data Structures
by BrowserUk (Pope) on May 02, 2008 at 21:07 UTC

    Without @{ .. } to derefernce the anonymous array reference, $x would be set to that array reference and $y & $z would be undef.

    $line[ 1 ][ 2 ] = [ 3,4,5 ];; my( $x, $y, $z ) = $line[ 1 ][ 2 ];; print for $x, $y, $z;; ARRAY(0x194a9f8) Use of uninitialized value in print at ... Use of uninitialized value in print at ...

    With the dereference:

    my( $x, $y, $z ) = @{ $line[ 1 ][ 2 ] };; print for $x, $y, $z;; 3 4 5

    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

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