Re: I need regex last instance help

On 10/26/25 8:51 PM, William Michels wrote:
> In the Raku REPL:
> 
> [0] > .Str.say for "first line\nsecond line" ~~ m:g/ ^ \w+ /
> first
> [0] > .Str.say for "first line\nsecond line" ~~ m:g/ ^^ \w+ /
> first
> second
> [0] > .Str.say for "line first\nline second" ~~ m:g/ \w+ $ /
> second
> [0] > .Str.say for "line first\nline second" ~~ m:g/ \w+ $$ /
> first
> second
> 
> HTH, Bill.
> 
>> On Oct 26, 2025, at 14:50, ToddAndMargo via perl6-users <perl6- 
>> [email protected]> wrote:
>>
>> On 10/26/25 7:56 AM, William Michels wrote:
>>> ^^  has the regex meaning "start-of-line"
>>> $$  has the regex meaning "end-of-line"
>>> Compare to:
>>> ^  has the regex meaning "start-of-string"
>>> $  has the regex meaning "end-of-string"
>>> If you're analyzing input linewise (for example using a one-liner 
>>> with `-ne` or `-pe` flags),
>>> then start-of-line equals start-of-string, and end-of-line equals 
>>> end- of-string.
>>> HTH, Bill.
>>
>>
>> Can I talk you out of a few examples?
> 

Hi Bill,

Thank you!

Would you double check my understanding?

-T


Extract the first (^) word (\w+) from the first line
[0] > .Str.say for "first line\nsecond line" ~~ m:g/ ^ \w+ /
first

Extract the first (^^) word (\w+) from all the lines
[0] > .Str.say for "first line\nsecond line" ~~ m:g/ ^^ \w+ /
first
second

Extract the last ($) word (\w+) from the last line
[0] > .Str.say for "line first\nline second" ~~ m:g/ \w+ $ /
second

Extract the last ($$) word (\w+) from all the lines
[0] > .Str.say for "line first\nline second" ~~ m:g/ \w+ $$ /
first
second