erik has asked for the wisdom of the Perl Monks concerning the following question:

Hello brothers in Perl-ism,

I have been googling about element-wise operations on arrays and all that I found was that it's a subject of debate if/how it should be introduced in Perl 6.

Do you know better? Is it available in Perl 5.8.8 directly (built-in) or indirectly (module or snippet)? Supposing that I code it myself, do you recommend me to just do it as a set of functions accepting arrays/scalars as arguments or as an overload of operators?

Thanks in advance for your suggestions!

Erik

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Re: Element-wise operations
by moritz (Cardinal) on Feb 27, 2008 at 13:41 UTC
    PDL implements mathematic operations on arrays.

    Apart from that, it all depends. 

    # calling a method on each item:
#Perl 6:
@list>>.method;
#Perl 5:
map { $_->method } @list;

# summing all elements:
#Perl 6:
my $sum = [+] @numbers;

# Perl 5:
use List::Util qw(sum);
my $sum = sum @numbers;

# adding two vectors item by item:
# Perl 6:
@v1 >>+<< @v2;

# Perl 5: Needs PDL or overloading for neat syntax.

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