Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re: Help modifying recursive regex

by gurpreetsingh13 (Scribe)
on May 08, 2013 at 05:25 UTC ( #1032577=note: print w/ replies, xml ) Need Help??


in reply to Help modifying recursive regex

Yes, splitting is the simple solution.

sub get_groups { my @groups = (); my $level = 0; my $group = ""; #Keep on increasing the level once you find the opening brace. #After coming out of loop, level should be again 0 foreach my $val ( split //, shift ) { next if $val =~/\s/; if ( $level == 0 && !($val ~~ [ "(", ")" ]) ) { push @groups, +$val; next; } if ( $level != 0 && !($val ~~ [ "(", ")" ]) ) { $group.=$val; +next; } if ( $val eq "(" && $level==0) { $level++;$group = ""; next; } if ( $val eq "(" && $level!=0) { $level++;$group .= "("; next; + } if ( $val eq ")" && $level==1) {$level--;push @groups, $group; + $group = ""; next; } if ( $val eq ")" && $level!=1) {$level--;$group .= ")"; next; +} } print Dumper(@groups); } ## ---------- end sub get_groups

Input:

my $string = "A (B C D)"; get_groups($string); $string = "A (B C D) (E F G)"; get_groups($string); $string = "A B (C (D E) (F G)) (H I)"; $string = "(A B) M N ((C (D E)) (F G)) (Z(H I)) T R"; get_groups($string);

Output: $VAR1 = 'A'; $VAR2 = 'BCD'; $VAR1 = 'A'; $VAR2 = 'BCD'; $VAR3 = 'EFG'; $VAR1 = 'AB'; $VAR2 = 'M'; $VAR3 = 'N'; $VAR4 = '(C(DE))(FG)'; $VAR5 = 'Z(HI)'; $VAR6 = 'T'; $VAR7 = 'R';


Comment on Re: Help modifying recursive regex
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1032577]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (13)
As of 2015-07-03 11:25 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (51 votes), past polls