The capture variables ($1 $2 etc.) are set to the contents of their corresponding capture groups if there is a match; if there is no corresponding capture group, the capture variable is set to undef. If there is no match, the capture variable is uncanged.

In reply to Re^7: Error: Use of uninitialized value $item in concatenation (.) or string at... by AnomalousMonk
in thread Error: Use of uninitialized value $item in concatenation (.) or string at... by jonc

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