in reply to this doesn't sort

Use:

@bigArray = sort { $a->[$sortNdx] <=> $b->[$sortNdx] } @bigArray;

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Re^2: this doesn't sort
by hsfrey (Beadle) on Feb 26, 2012 at 06:36 UTC
    Yes, That did it perfectly! :-) Thank you!

    But I don't understand it! I can't even make syntactic sense out of it. :-(

    I tried replacing $a->[$sortNdx] with [$a][$sortNdx], which I thought would be syntactically the same thing, but got a syntax error.

    Could you explain to me what's going on?

    Thanks.

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      Inside the sort block, $a and $b are elements of @bigArray, not indexes into it.

      So if @bigArray contains array refs, both $a and $b end up being an array ref. And you can dereference and index into an array with the $a->[$index] syntax.

      On the other hand if you write [$a], you wrap the array ref in $a into another array ref -- not what you want.

      See perlreftut and perlref for more details.

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        Thanks so much!
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