7.2 Perl 4

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7.2 Perl 4

Most easily recognized by the absence of:

  • use

  • my

  • =>

  • References

  • Objects

  • :: as a package component separator (instead of ')

  • POD

There were many, many other things added in Perl 5such as BEGIN and END blocks, the /x modifier on regular expressionsbut the preceding are going to be your major markers.

This code is likely to contain more uses of eval(), do(), local(), and typeglobs (*) than you would see in Perl 5 programs.

7.2.1 Upgrading to Perl 4

There being no prior versions of Perl I wish to consider for this purpose, this section is intentionally left blank.

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