Re^2: Question about returning array from sub

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Re^3: Question about returning array from sub by QM (Parson) on Jul 10, 2015 at 13:00 UTC
Perl does multidimensional arrays by storing elements of the sub-array in the parent array. So `$x[0][1] = 12;` [download] is the syntactic-sugar equivalent of `$x[0]->[1] = 12;` [download] (IIRC, in Perl 4, this was the required invocation.) And the whole sub-array as `$x[0] = \@subarray;` [download] You might also think about it like this: `@x = ( ["some", "sub", "array"], ["next", "sub", "array] );` [download] which is making anonymous arrays, and assigning the lot to `@x`. And these can be nested as deeply as you have memory for (AFAIK, but that would be a good exercise to check). Update: Yes, it seems that simply nesting empty arrays keeps going until it runs out of memory, starts swapping, and in my case, is killed by the OS. -QM -- Quantum Mechanics: The dreams stuff is made of	[reply] [d/l] [select]

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Re^3: Question about returning array from sub
by QM (Parson) on Jul 10, 2015 at 13:00 UTC

$x[0][1] = 12;
[download]

is the syntactic-sugar equivalent of

$x[0]->[1] = 12;
[download]

(IIRC, in Perl 4, this was the required invocation.)

And the whole sub-array as

$x[0] = \@subarray;
[download]

You might also think about it like this:

@x = ( ["some", "sub", "array"], ["next", "sub", "array] );
[download]

which is making anonymous arrays, and assigning the lot to @x. And these can be nested as deeply as you have memory for (AFAIK, but that would be a good exercise to check).

Update:

Yes, it seems that simply nesting empty arrays keeps going until it runs out of memory, starts swapping, and in my case, is killed by the OS.

-QM
--
Quantum Mechanics: The dreams stuff is made of

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