comment on

When does RAM become an issue?

Sooner or later

How would I adapt this solution to refer to a separate input file?

Read perlintro you can't skip that

What would be the best reference source, for purposes of interpreting the few Perl codes suggested in that solution?

Combine ppi_dumper with Perl documentation / Modern Perl and super search/Tutorials...

$ ppi_dumper code.pl
PPI::Document
  PPI::Token::Comment      '#! perl -slw\n'
  PPI::Statement::Include
    PPI::Token::Word      'use'
    PPI::Token::Whitespace      ' '
    PPI::Token::Word      'strict'
    PPI::Token::Structure      ';'
  PPI::Token::Whitespace      '\n'
  PPI::Token::Whitespace      '\n'
  PPI::Statement::Variable
    PPI::Token::Word      'my'
    PPI::Token::Whitespace      ' '
    PPI::Token::Symbol      '@array'
    PPI::Token::Whitespace      ' '
    PPI::Token::Operator      '='
    PPI::Token::Whitespace      ' '
    PPI::Token::Word      'split'
    PPI::Token::Whitespace      ' '
    PPI::Token::Quote::Single      ''term''
    PPI::Token::Operator      ','
    PPI::Token::Whitespace      ' '
    PPI::Token::Word      'do'
    PPI::Structure::Block      { ... }
      PPI::Token::Whitespace      ' '
      PPI::Statement::Variable
        PPI::Token::Word      'local'
        PPI::Token::Whitespace      ' '
        PPI::Token::Magic      '$/'
        PPI::Token::Structure      ';'
      PPI::Token::Whitespace      ' '
      PPI::Statement
        PPI::Token::Operator      '<'
        PPI::Token::Word      'DATA'
        PPI::Token::Operator      '>'
      PPI::Token::Whitespace      ' '
    PPI::Token::Structure      ';'
  PPI::Token::Whitespace      '\n'
  PPI::Statement
    PPI::Token::Word      'shift'
    PPI::Token::Whitespace      ' '
    PPI::Token::Symbol      '@array'
    PPI::Token::Structure      ';'
  PPI::Token::Whitespace      ' '
  PPI::Token::Comment      '## Discard leading null'
  PPI::Token::Whitespace      '\n'
  PPI::Token::Whitespace      '\n'
  PPI::Statement
    PPI::Token::Word      'print'
    PPI::Token::Whitespace      ' '
    PPI::Token::Quote::Single      ''---''
    PPI::Token::Operator      ','
    PPI::Token::Whitespace      ' '
    PPI::Token::Quote::Double      '"\n"'
    PPI::Token::Operator      ','
    PPI::Token::Whitespace      ' '
    PPI::Token::Magic      '$_'
    PPI::Token::Operator      ','
    PPI::Token::Whitespace      ' '
    PPI::Token::Quote::Double      '"\n"'
    PPI::Token::Whitespace      ' '
    PPI::Token::Word      'for'
    PPI::Token::Whitespace      ' '
    PPI::Token::Symbol      '@array'
    PPI::Token::Structure      ';'
  PPI::Token::Whitespace      '\n'
  PPI::Token::Whitespace      '\n'
  PPI::Statement::Data
    PPI::Token::Separator      '__DATA__'
    PPI::Token::Whitespace      '\n'
    PPI::Token::Data      'term {\nyada yada\n12345\n() ...\n}\n\nterm
+ only occurs here {\ncould be 30 lines here\nbut never that word agai
+n until\nanother block starts\nyadada\n}\n\nterm, etc.'
[download]

So operator, __DATA__, local, $_, $_...

Which version of Perl should I install, to run this code?

It will run on any perl that starts with a "5." , anything released in the last 20+ years

In reply to Re: Learning Perl by Doing by Anonymous Monk
in thread Learning Perl by Doing by raywood

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


No such thing as a small change
	PerlMonks