https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369906#M65071 <P>The link below will give you more details on these type of pattern modifiers. Please check the pattern modifiers section in the link.</P> <P>&nbsp;</P> <P>&nbsp;</P> <TABLE width="100%" border="0"> <TBODY> <TR> <TD> <TABLE border="1"> <TBODY> <TR> <TD><TT class="literal">/x</TT></TD> <TD>Ignore (most) whitespace and permit comments in pattern.<A name="INDEX-1346" target="_blank"></A></TD> </TR> <TR> <TD><TT class="literal">/o</TT></TD> <TD>Compile pattern once only.<A name="INDEX-1347" target="_blank"></A></TD> </TR> </TBODY> </TABLE> </TD> </TR> </TBODY> </TABLE> <P>&nbsp;</P> <P><A href="https://docstore.mik.ua/orelly/perl/prog3/ch05_02.htm" target="_blank">https://docstore.mik.ua/orelly/perl/prog3/ch05_02.htm</A></P> <P>&nbsp;</P> <P>&nbsp;</P> Fri, 23 Jun 2017 14:35:31 GMT Jagadishkatam 2017-06-23T14:35:31Z https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369848#M65066 <P>Hello:</P><P>&nbsp;</P><P>What are the x or o represent?&nbsp; Thanks.</P><P>&nbsp;</P><P><A href="http://analytics.ncsu.edu/sesug/2012/CT-03.pdf" target="_blank">http://analytics.ncsu.edu/sesug/2012/CT-03.pdf</A></P> Fri, 23 Jun 2017 12:50:36 GMT https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369848#M65066 ybz12003 2017-06-23T12:50:36Z https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369850#M65067 <P>You can Google search for something like that, top result:</P> <P>&nbsp;</P> <P><A href="https://perldoc.perl.org/perlre.html" target="_blank">https://perldoc.perl.org/perlre.html</A></P> Fri, 23 Jun 2017 12:54:17 GMT https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369850#M65067 RW9 2017-06-23T12:54:17Z https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369906#M65071 <P>The link below will give you more details on these type of pattern modifiers. Please check the pattern modifiers section in the link.</P> <P>&nbsp;</P> <P>&nbsp;</P> <TABLE width="100%" border="0"> <TBODY> <TR> <TD> <TABLE border="1"> <TBODY> <TR> <TD><TT class="literal">/x</TT></TD> <TD>Ignore (most) whitespace and permit comments in pattern.<A name="INDEX-1346" target="_blank"></A></TD> </TR> <TR> <TD><TT class="literal">/o</TT></TD> <TD>Compile pattern once only.<A name="INDEX-1347" target="_blank"></A></TD> </TR> </TBODY> </TABLE> </TD> </TR> </TBODY> </TABLE> <P>&nbsp;</P> <P><A href="https://docstore.mik.ua/orelly/perl/prog3/ch05_02.htm" target="_blank">https://docstore.mik.ua/orelly/perl/prog3/ch05_02.htm</A></P> <P>&nbsp;</P> <P>&nbsp;</P> Fri, 23 Jun 2017 14:35:31 GMT https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/369906#M65071 Jagadishkatam 2017-06-23T14:35:31Z https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/370015#M65073 <P>Thanks for your great information.</P> Fri, 23 Jun 2017 17:02:16 GMT https://communities.sas.com/t5/SAS-Procedures/Modifiers-control-the-behaviour-of-the-matching-part-of-the/m-p/370015#M65073 ybz12003 2017-06-23T17:02:16Z