Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer

Re^4: What's the "...0" mean?

by lidden (Curate)
on Oct 15, 2010 at 22:56 UTC ( #865581=note: print w/replies, xml ) Need Help??

in reply to Re^3: What's the "...0" mean?
in thread What's the "...0" mean?

The part before the dots turns the flip flop operator to true, the part after sets it to false when it matches.

An example of how the flip flop operator works.

my @array = qw- 1 2 3 on 4 5 off 6 7 8 on 9 10 11 12 off 13 14 15 -; for (@array){ say if /on/ ... /off/; }
Update: Added example.

Replies are listed 'Best First'.
Re^5: What's the "...0" mean?
by morgon (Curate) on Oct 15, 2010 at 23:24 UTC
    That is a good example.

    But in the original question

    perl -ne 'print if s/.*?(?=abc)//...2' input.txt
    the flip-flop is true on the first line (the substitution) and remains to be true on the second line (the comparison with line number).

    But should it then not remain false for the rest of the file resulting in no more lines being printed?

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://865581]
and monks are getting baked in the sun...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (3)
As of 2017-09-19 23:14 GMT
Find Nodes?
    Voting Booth?
    During the recent solar eclipse, I:

    Results (230 votes). Check out past polls.