Well a weird thing that i dont understand:
I have this piece of code in the middle of a program:

my $num=0;
for(@taulell)
{
    $num+=grep /B/,@$_;
} 

addstr(2,1,"B = $num");
addstr(24,3, "Y = $pos{y}");
$num=0;

map 
{
    $num+=grep /B/,@$_;
} @taulell;      
addstr(3,1,"N = $num");
addstr(24,35,"Tecla = <$key> ");

[download]

And it works well, but if i change it to:

my $num=0;

#for(@taulell)
#{
#    $num+=grep /B/,@$_;
#} 

addstr(2,1,"B = $num");
addstr(24,3, "Y = $pos{y}");
$num=0;

map 
{
    $num+=grep /B/,@$_;
} @taulell;      
addstr(3,1,"N = $num");
addstr(24,35,"Tecla = <$key> ");

[download]

I GET THE ERROR:

Modification of a read-only value attempted in the line inside the map

What's happening?

The entire code is HERE

Yes map in voice content is why i want to do something like:

addstr(3,1,"N = ". scalar map { grep { /B/ } @$_ } @taulell );

[download]

$anarion=\$anarion;

s==q^QBY_^=,$_^=$[x7,print

In reply to Commenting irrelevant code produces weirds errors by Anarion

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