backreferences in perlre are used to be written \1, \2 ... tweetiepooh informs me that my perldoc used was outdated... and ikegami again corrects that.

Update: your programme prints "This is fish".
What did you expect it to print? "This is fish 1"?

Further update: see ikegami's solution below.

Third and then fourth update - in italics

Cheers, Sören

In reply to Re: How do I pass $1 to s///? by Happy-the-monk
in thread How do I pass $1 to s///? by Anonymous Monk

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