Modifiers control the behaviour of the matching part of the regex (i.e.such x or o )?

[ybz12003]

Hello:

What are the x or o represent?  Thanks.

http://analytics.ncsu.edu/sesug/2012/CT-03.pdf

[RW9]

You can Google search for something like that, top result:

https://perldoc.perl.org/perlre.html

[Jagadishkatam · Accepted solution]

The link below will give you more details on these type of pattern modifiers. Please check the pattern modifiers section in the link.

/x	Ignore (most) whitespace and permit comments in pattern.
/o	Compile pattern once only.

https://docstore.mik.ua/orelly/perl/prog3/ch05_02.htm

[ybz12003]

Thanks for your great information.