In basic I say Dim var$(50,50), how to make 2 dimensional aray in Perl?

[max]

In basic language I say
Dim var$(50,50)
or
Dim var$(50,50,50)
, how to make 2 or 3 dimensional array in Perl?

Thanks

 

[A. Sinan Unur]

, how to make 2 or 3 dimensional array in Perl?

perldoc perldsc

 

[max]

In basic language I say

perldoc perldsc

I'm not sure that I understand.
In Perl I must use "arrays of arrays" to make multidimensional array?

Is that mean:

In Perl
$array[3][3]

In Basic is
DIM array (3,3)

?

 

[Brian McCauley]

And perllol too!

I'm not sure that I understand.
In Perl I must use "arrays of arrays" to make multidimensional array?

Yes (as in many (most?) languages).

Is that mean:

In Perl
$array[3][3]

In Basic is
DIM array (3,3)

Perl's inbuilt array type is not of fixed dimention. Just use it as you
want. Thanks to a little thing we call autovivifiction simply referring
to $array[2][2] will automagically create an new anonymous array and
store a reference (pointer) to it in $array[2].

If you really want to prepopulate...

my @array = map {[(undef) x 3 ]} 1..3; # 3x3 array of undef

But usually there's no reason to prepopulate...

my @array; # Empty array use it as you want

 

[Jürgen Exner]

I'm not sure that I understand.
In Perl I must use "arrays of arrays" to make multidimensional array?

Correct. Or rather almost correct because "array of array" is actually a
sloppy term for "array of references to arrays".

Is that mean:

In Perl
$array[3][3]

In Basic is
DIM array (3,3)

No. $array[3][3] is one individual/specific element of a nested array (it
just happens to be the third element in the third array). Your Basic
statement on the other hand declares a multidimensional array with 3x3
elements. Two completely different things.

The closest corresponding Perl code would be
my @array;
but that neither indicates the size (the size of Perl arrays is dynamic) nor
that the values will be references to arrays (Perl doesn't care).

jue

 

[Tad McClellan]

No. $array[3][3] is one individual/specific element of a nested array (it
just happens to be the third element in the third array).

^^^^^ ^^^^^

s/third/fourth/g; #

 

[RedGrittyBrick]

my @power;

for (my $x = 0; $x < 3; $x ++) {
for (my $y = 0; $y < 5; $y ++) {
$power [$x] [$y] = $x ** $y;
}
}

I much prefer ...

for my $x (0..2) {
for my $y (0..4) {
$power [$x] [$y] = $x ** $y;
}
}

.... perhaps because I'm not a C programmer.