Calling perl function in ruby

[Loga Ganesan]

Below code is used for calling c function in ruby.

#! /usr/bin/ruby

require '/usr/lib/ruby/1.8/inline.rb'

puts "Inline module......"
class MyTest
inline do |builder|
builder.c "
long factorial(int max) {
int i=max, result=1;
while (i >= 2) { result *= i--; }
return result;
}"
end
end
t = MyTest.new()
fact = t.factorial(5)
puts fact

Question:

Likewise, instead of c I have to write a perl function and should call
it?

Is there an way?

 

[Robert Klemme]

Below code is used for calling c function in ruby.

Likewise, instead of c I have to write a perl function and should call
it?

Additionally to what Brian recommended: did you check whether there is
another option? Maybe there is a Ruby implementation of the Perl code
you need. IMHO generally the benefits of embedding one scripting
language in another are pretty low so I'd rather either use a Ruby
implementation of the code you need or do as Brian suggested and keep
the Perl code in a separate process which you then call via fork,
popen or whatever means is appropriate.

Kind regards

robert

 

[Loga Ganesan]

Ya, Here is the code to acheive it. But I don't know that whether it is
an efficient coding.


#! /usr/bin/ruby
#
require 'perl'

perl_obj = Perl.new()

perl_obj.eval("
#!/usr/bin/perl
use strict;
use warnings;

sub factorial {
my $n = 1;
$n *= $_ for 2..shift;
return $n;
}")

ret = perl_obj.call("factorial", 5)

puts ret

 

[Maran Chandrasekar]

Ya, Here is the code to acheive it. But I don't know that whether it is
an efficient coding.


#! /usr/bin/ruby
#
require 'perl'

downloaded from http://www.yoshidam.net/perl-0.2.9.tar.gz

perl_obj = Perl.new()

perl_obj.eval("
#!/usr/bin/perl
use strict;
use warnings;

sub factorial {
my $n = 1;
$n *= $_ for 2..shift;
return $n;
}")

ret = perl_obj.call("factorial", 5)

puts ret

Yes, It is working. Nicely done, Loganathan

 

[Thomas Preymesser]

#! /usr/bin/ruby
=A0 =A0 =A0 =A0#!/usr/bin/perl

you should use #!/usr/bin/env ruby
#!/usr/bin/env perl
instead.
This is more portable and takes the ruby command from the PATH of the
user and not from a fixed path.

-Thomas

--=20
Thomas Preymesser
(e-mail address removed)
http://thopre.googlepages.com/
http://thopre.wordpress.com/
Sent from: Berlin Berlin Deutschland.

 

[Eric Hodel]

Below code is used for calling c function in ruby.

#! /usr/bin/ruby

require '/usr/lib/ruby/1.8/inline.rb'

puts "Inline module......"
class MyTest
inline do |builder|
builder.c "
long factorial(int max) {
int i=max, result=1;
while (i >= 2) { result *= i--; }
return result;
}"
end
end
t = MyTest.new()
fact = t.factorial(5)
puts fact

Question:

Likewise, instead of c I have to write a perl function and should call
it?

Is there an way?

There's an Inline:erl in ZenHacks, but it's never been released.