Hi,

Thanks for both suggestions!

I just told him :-D

The objective is to get a list all required elements of @a not present in @b while @b may have optional elements.
The desired client goal is to have this in a fancy grep oneliner for easy hideous copy-pasting across the code snippets.

The 2 code snippets reach the objective in an "unfancy way".



@B = grep (  /(??{join( '|', @A)})/gi, keys %H );
@B = grep ( !/(??{join( '|', @B)})/gi, @A );
print "Delta:\n";
print Dumper(@B);
foreach $i (@A){if (!(grep (/$i/i, keys %H))){print "$i\n";};};



 
 


In reply to Re^4: Can "delayed-regex assertions" be nested...
by ddn123456

in thread Can "delayed-regex assertions" be nested...
by ddn123456





Title:




Use:  <p> text here (a paragraph) </p>

and:  <code> code here </code>

to format your post, it's "PerlMonks-approved HTML": 











 
 



  •  Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data! 
    • 

  •  Titles consisting of a single word are discouraged, and in most cases are disallowed outright. 
    • 


  • 
  Read Where should I post X? if you're not absolutely sure you're posting in the right place.

    • 


  • 
  Please read these before you post! —

    • 


  • 
  Posts may use any of the Perl Monks Approved HTML tags: 
  
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
    

    • 






  • 
  You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

  
    
  
    
           
     For: 
       
     Use: 
  
    
  
     &  &amp; 
    
  
     <   &lt;  
    
  
     >   &gt;  
    
  
     [  &#91; 
    
  
     ]  &#93; 
    
  
    


    • 

  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
    • 

  • 
  See Writeup Formatting Tips and other pages linked from there for more info.

    •