Re: How do I pass $1 to s///?

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 tweetiepooh informs me that my perldoc used was outdated...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

Comment on Re: How do I pass $1 to s///?

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Re^2: How do I pass $1 to s///? by ikegami (Patriarch) on Jan 06, 2006 at 17:42 UTC
Still not quite right. Backreferences are \1, \2, etc in the LHS (regexp part) of the substitution. Backreferences are $1, $2, etc in the RHS (substitituion part) of the substitution. Lastest perlre (via `[doc://perlre]`)	[reply] [d/l]
Re^2: How do I pass $1 to s///? by tweetiepooh (Hermit) on Jan 06, 2006 at 17:09 UTC
\1,\2 If warnings are on using these lead to `\1 better written as $1` [download] There is a section in perlre about it.	[reply] [d/l]
Re^2: How do I pass $1 to s///? by Anonymous Monk on Jan 06, 2006 at 17:03 UTC
> your programme prints "This is fish". ...and gives a warning about $1 being uninitialised :( > What did you expect it to print? "This is fish 1"? Yeah. I've tried "fish \1", "fish \\1", "fish \\\1" as well though with no more luck!	[reply]