DB<107> $str=join ",",@captures 
 => "http://abc.org,http://de,f.org,https://ghi.org"

  DB<108> split /,(?=https?:)/,$str,1
 => "http://abc.org,http://de,f.org,https://ghi.org"

  DB<109> split /,(?=https?:)/,$str,2
 => ("http://abc.org", "http://de,f.org,https://ghi.org")

  DB<110> split /,(?=https?:)/,$str,3
 => ("http://abc.org", "http://de,f.org", "https://ghi.org")