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More stuff derived from sh:

  • # as comment character.
  • Here-docs (perl's being much more powerful).
  • Capturing command stdout with backticks, i.e. `$cmd`.
  • "$var" interpolates $var, while '$var' does not.
  • Built-in vars: $? status of last command; $$ pid; $0 program name.
  • Having separate "string" versus "numeric" operators, albeit with different names; for example, shell uses = for string equality, -eq for numeric, while perl is more logical (string variants alphabetic), == for numeric, eq for string.
  • && and || operators (ok, C has these too).
  • the tr function seems inspired by Unix tr command, with y synonym to appease sed fanatics (modern day golfers being grateful for said sed fanatics early influence:-).
  • Many other perl internal functions seem inspired from sh or Unix commands, for example: shift, chown, chmod, mkdir, eval, exit, kill, sleep, umask.

In reply to Re^3: Perl influences? by eyepopslikeamosquito
in thread Perl influences? by DaWolf

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