Perl - Regex to extract only the comma-separated strings -

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i have question hoping with...

i have variable contains content webpage (scraped using www::mechanize).

the variable contains data such these: 

$var = "ewrfs sdfdsf cat_dog,horse,rabbit,chicken-pig" $var = "fdsf iiukui aawwe dffg elephant,mouse_rat,spider,lion-tiger hdsfds jdlkf sdf" $var = "dsadp poids pewqwe antelope-giraffe,frog,fish,crab,kangaroo-koala sdfdsf hkew"

the bits interested in above examples are:

@array = ("cat_dog","horse","rabbit","chicken-pig") @array = ("elephant","mouse_rat","spider","lion-tiger")  @array = ("antelope-giraffe","frog","fish","crab","kangaroo-koala")

the problem having:

i trying extract comma-separated strings variables , store these in array use later on.

but best way make sure strings @ start (ie cat_dog) , end (ie chicken-pig) of comma-separated list of animals not prefixed/suffixed comma.

also, variables contain webpage content, inevitable there may instances commas immediately succeeded space , word, correct method of using commas in paragraphs , sentences...

for example:

saturn long thought ringed planet, however, known not case.                                                       ^        ^                                                      |        |                                     note spaces here , here

i not interested in cases comma followed space (as shown above).

i interested in cases comma not have space after (ie cat_dog,horse,rabbit,chicken-pig)

i have tried number of ways of doing cannot work out best way go constructing regular expression.

how about

[^,\s]+(,[^,\s]+)+

which match 1 or more characters not space or comma [^,\s]+ followed comma , 1 or more characters not space or comma, 1 or more times.

further comments

to match more 1 sequence add g modifier global matching.
following splits each match $& on , , pushes results @matches. 

my $str = "sdfds cat_dog,horse,rabbit,chicken-pig more pig,duck,goose"; @matches;  while ($str =~ /[^,\s]+(,[^,\s]+)+/g) {     push(@matches, split(/,/, $&)); }     print join("\n",@matches),"\n";

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