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if 0(zero) is acceptable then don't do this.

More specifically, if one of the following is acceptable, then don't do this:

  • 0 (numeical zero),
  • '0' (the string consisting exactly of the character zero),
  • '' (the zero-length string),
  • undef (the undefined value), or
  • something that evaluates to one of the above in boolean context

In reply to Re^2: shift vs @_ by ikegami
in thread shift vs @_ by Zadeh

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