Java and Perl

about me

public class AboutMe {
    public static void main(String[] args) {
        System.out.println("Java Developer and Trainer");
    }
}

#!/usr/bin/env perl

print 'I used to be a Perl Dev.', "\n";

Hello World Should Be One Line?

• classes, privacy, types, methods
• arrays, chained method calls
• what the file is named is important!

what people say ...

doesn't scale

line noise

cleverness, correctness

small code size

not this talk!

scalability

garbage collection

typing

exception handling

garbage collection

perl5 ref count, undef ...

java automagic - YMMV!

perl6 moarvm 2-stage

typing

• static
  • safety
  • runtime speed
  • morer righter
• dynamic
  • more expressive

typing

• java static but i can cast
• perl5 dynamic but Moose, introspection
• perl6 ...

exception handling

• perl5 eval, Try::Tiny
• java try{..} catch(){..} finally
• perl6 try{ CATCH { when{..}} die}

practical

• jobs? J=2, P=14
• will your skills xfer?
• what do you need?
  • stability?
  • flexibility?
  • speed?
• does your language/tools help/hurt?

conclusion

• the language doesn't matter: the algorithm does.
  • ​i don't mean only math

use the right tool for the job

use both!

links

• http://bit.ly/2cneUPE

• http://bit.ly/2bXk6G0

• http://bit.ly/2bKHjQI

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