Re: Greedy flip flop operator?

You need this: print if (/^start/ .. /^\[^\+]/); # EDIT: /^\[^\+]/ is wrong!

Infact your version says: print between start and (the first) + included , while mine prints between start and a not + included. ie it will print also the first new line without a leading +

The flip flop operator is already greedy: it is true between two patterns, included. In you case perhaps it's better something else: have a switch that signal if start was found and if so just print out strings starting with a + sign.

PS see also my library links

There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

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Re^2: Greedy flip flop operator? by LanX (Saint) on Apr 26, 2018 at 07:25 UTC
> `/^\[^\+]/` Shouldn't it rather be `/^[^+]/` ? I'd also test for following `\w+` to avoid whitespace confusion. Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Wikisyntax for the Monastery}	[reply] [d/l] [select]
Re^3: Greedy flip flop operator? by Discipulus (Canon) on Apr 26, 2018 at 07:36 UTC
`/^[^+]/` will end at the first empty line (if they really are there as shown).. anyway you are right: I must not post before coffe L* There are no rules, there are no thumbs.. Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.	[reply] [d/l]
Re^4: Greedy flip flop operator? by LanX (Saint) on Apr 26, 2018 at 07:51 UTC
> will end at the first empty line Really? Can't test at the moment but an empty line shouldn't match a character class cause it requires at least one character. Of course you could have whitespace characters, that's why I'd include `\w+` Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Wikisyntax for the Monastery}	[reply] [d/l]
Re^3: Greedy flip flop operator? by chengchl (Acolyte) on Apr 26, 2018 at 07:56 UTC
Hi Rolf, It seems it will only print the first line... When i execute the code as you instructed.	[reply]
Re^4: Greedy flip flop operator? by LanX (Saint) on Apr 26, 2018 at 08:57 UTC
Which code, which input? Please put both in code tags `<code>...</code>` Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Wikisyntax for the Monastery}	[reply] [d/l]
Re^2: Greedy flip flop operator? by chengchl (Acolyte) on Apr 26, 2018 at 08:06 UTC
Thanks L. I think we should use ... instead of .. for the flip flop operator. Thanks again!	[reply]