Ruby One-Liners

Re:Ruby One-Liners by cutler on Saturday September 14, 2019 @10:39PM (#20975233)

I heard Matz is going to remove the Perl special variables in Ruby 3.0. Can't think what the fuss is all about. They're pretty useful in command-line Ruby. I moved from Perl to Ruby so I will be sad to see this bit of Perl heritage removed from Ruby. I mean for what gain?

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Re:Ruby One-Liners by byroot on Sunday September 15, 2019 @12:05PM (#20977835)

Only a very small subset of them: https://bugs.ruby-lang.org/issues/14240

    $/    input record separator (default argument for "gets")
    $\    output record separator ("print" prints it at last)
    $,    default separator for Array#join and print
    $;    default separator for String#split

As for the gain it's because these variables globally change the behavior of important core methods. They really aren't that useful, but can easily cause havoc.

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