in reply to Re: How to split
in thread How to split

Adventures in regular expressions 

#!/usr/bin/perl --
use strict; use warnings;
use Data::Dump;

my $blah = '    VAR DS 0D
        DC    AL1(045),AL2(286),AL2(117),AL2(290)';

my ( $top, $bottom ) = split /[\r\n]+/, $blah;
print "$top\n";

#~ my( $prefix, @biscuits ) = grep length, split /[\s,]+/, $bottom;
my( $prefix, @biscuits ) = split /(?:(?<!^)\s+)|,/, $bottom;

dd \$prefix, \@biscuits ;

for my $tack ( @biscuits ){
    print "$prefix $tack\n";
}
__END__
$ perl shineon001
    VAR DS 0D
(\" ", ["DC", "AL1(045)", "AL2(286)", "AL2(117)", "AL2(290)"])
  DC
  AL1(045)
  AL2(286)
  AL2(117)
  AL2(290)

[download]

Replies are listed 'Best First'.
Re^3: How to split
by Anonymous Monk on Sep 13, 2012 at 08:01 UTC

    Adventures in regular expressions, part 2 

    #!/usr/bin/perl --
use strict; use warnings;
use Data::Dump;

my $blah = '    VAR DS 0D
        DC    AL1(045),AL2(286),AL2(117),AL2(290)';

my ( $top, $bottom ) = split /[\r\n]+/, $blah;
print "$top\n";

#~ my( $prefix, @biscuits ) = grep length, split /[\s,]+/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!^)\s+)|,/, $bottom;
my( $prefix, @biscuits ) = split /(?:(?<!^)\b\s+)|,/, $bottom;

dd \$prefix, \@biscuits ;

for my $tack ( @biscuits ){
    print "$prefix $tack\n";
}
__END__
$ perl shineon002
    VAR DS 0D
(
  \"        DC",
  ["AL1(045)", "AL2(286)", "AL2(117)", "AL2(290)"],
)
        DC AL1(045)
        DC AL2(286)
        DC AL2(117)
        DC AL2(290)

    [download]
[reply]
[d/l]

      Adventures in regular expressions, part 4 

      #!/usr/bin/perl --
use strict; use warnings;
use Data::Dump;

my $blah = '    VAR DS 0D
        DC    AL1(045),AL2(286),AL2(117),AL2(290)';

my ( $top, $bottom ) = split /[\r\n]+/, $blah;
print "$top\n";

#~ my( $prefix, @biscuits ) = grep length, split /[\s,]+/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!^)\s+)|,/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!^)\b\s+)|,/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!\A)\b\s+)|,/, $bottom;
my( $prefix, @biscuits ) = $bottom =~ /(^\s+\S+)|([^\s\(]+\([^\s\)]+\)
+)/g;

dd \$prefix, \@biscuits ;

for my $tack ( @biscuits ){
    print "$prefix $tack\n";
}
__END__
$ perl shineon004
Use of uninitialized value $tack in concatenation (.) or string at shi
+neon004 line 20.
Use of uninitialized value $tack in concatenation (.) or string at shi
+neon004 line 20.
Use of uninitialized value $tack in concatenation (.) or string at shi
+neon004 line 20.
Use of uninitialized value $tack in concatenation (.) or string at shi
+neon004 line 20.
Use of uninitialized value $tack in concatenation (.) or string at shi
+neon004 line 20.
    VAR DS 0D
(
  \"        DC",
  [
    undef,
    undef,
    "AL1(045)",
    undef,
    ",AL2(286)",
    undef,
    ",AL2(117)",
    undef,
    ",AL2(290)",
  ],
)
        DC 
        DC 
        DC AL1(045)
        DC 
        DC ,AL2(286)
        DC 
        DC ,AL2(117)
        DC 
        DC ,AL2(290)

      [download]
[reply]
[d/l]

        Adventures in regular expressions, part 5 

        #!/usr/bin/perl --
use strict; use warnings;
use Data::Dump;

my $blah = '    VAR DS 0D
        DC    AL1(045),AL2(286),AL2(117),AL2(290)';

my ( $top, $bottom ) = split /[\r\n]+/, $blah;
print "$top\n";

#~ my( $prefix, @biscuits ) = grep length, split /[\s,]+/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!^)\s+)|,/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!^)\b\s+)|,/, $bottom;
#~ my( $prefix, @biscuits ) = split /(?:(?<!\A)\b\s+)|,/, $bottom;
#~ my( $prefix, @biscuits ) = $bottom =~ /(^\s+\S+)|([^\s\(]+\([^\s\)]
++\))/g;
my( $prefix, @biscuits ) = $bottom =~ /(^\s+\S+|[^\s\(]+\([^\s\)]+\))/
+g;

dd \$prefix, \@biscuits ;

for my $tack ( @biscuits ){
    print "$prefix $tack\n";
}
__END__
$ perl shineon005
    VAR DS 0D
(
  \"        DC",
  ["AL1(045)", ",AL2(286)", ",AL2(117)", ",AL2(290)"],
)
        DC AL1(045)
        DC ,AL2(286)
        DC ,AL2(117)
        DC ,AL2(290)

        [download]
[reply]
[d/l]

In Section Seekers of Perl Wisdom