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    Another fun feature of ruby is the __END__ keyword. If that keyword appears alone on a line, ruby will stop parsing the file at that line. In the same file you can use the magic DATA variable to read the rest of the file. Eg:

    #!/usr/bin/env ruby
    puts DATA.read

    This program will output Hello\n when executed.

    This allows to easily create self-unpacking scripts for example, or to join data with code.

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      This feature is present in Perl too.

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        Perl’s documentation of its __END__ and __DATA__ special literals: https://perldoc.perl.org/perldata.html#Special-Literals

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      Very similar article that seems to be easier to understand and read than this one.

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        that’s your opinion.. What you say is very subjective..