Perl question regarding array elements…?

Within a subroutine, I need to pass in two parameters…a current altitude (which will be passed in from the altitude array), and the previous altitude (the element in the altitude array BEFORE the current element). I need it to do this for every function call. Any suggestions? Thanks!


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I have a perl server script running that many times doing memcpy as shown from pstack. Where could it from?

Could it be from passing variables to a subroutine?
Is it more efficient to access the variable through $_[0] or shift?
I have to pass some text and arrays from one sub to another.


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What is the best way to return multiple arrays from a Perl module?

I’m building an application comprising dozens of scripts and need to take advantage of code reuse for the first time in years of Perl coding. I wrote a module that collects & processes data, then returns it as a collection of arrays:

return (\@array1,\@array2,\@array3);

Obtaining that data from another script requires:

my ($r1,$r2,$r3) = &ModuleName::SubRoutine;
my (@array1) = @$r1;
my (@array2) = @$r2;
my (@array3) = @$r3;

This works fine, but it seems inelegant. Is there a better way?


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Executing Perl program on windows?

I am learning here so If I make mistakes just notify me which may be a lot

When I check the file by issuing the

perl -c couter1.pl

command which checks the file counter1.pl for errors it says syntax ok

but when I run the program it finds an error which I think I understand
The code below is the problem code well just the line separated. the length one not the char one

while(<INFILE>) {
$TheLine = $_;
chomp($TheLine) ;
$LineCount = $LineCount + 1;

$LineLen = length($TheLine);

$CharCount = $CharCount + $LineLen;

The error I’m presented with is an undefined subroutine.
which points out the line I think it means I haven’t declared a variable
the variable being the length one at the top where I declared the rest.
Like so is this the reason and how do I correct it if you want the full program I will copy and paste it in.
$CharCount = 0;
$WordCount = 0;
$LineCount = 0;

Any help is greatly appreciated.


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I Need Perl Programming Help!?

I am supposed to:
write a perl program that will compute the sum of pair score of a multiple alignment according to a given scoring matrix. Assume the aligned sequences are in FASTA format. This should also be in a subroutine.

Please Help!


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