progs/app3.scala
changeset 254 dcd4688690ce
parent 97 60a3ba90dd53
child 559 db5cb071644d
equal deleted inserted replaced
253:75c469893514 254:dcd4688690ce
     1 val my_urls = """urbanc""".r
     1 val my_urls = """urbanc""".r
     2 
     2 
     3 def crawl(url: String, n: Int) : Unit = {
     3 def crawl(url: String, n: Int) : Unit = {
     4   if (n == 0) ()
     4   if (n == 0) ()
     5   else if (my_urls.findFirstIn(url) == None) ()
     5   else if (my_urls.findFirstIn(url) == None) { 
       
     6     println(s"Visiting: $n $url")
       
     7     get_page(url); () 
       
     8   }
     6   else {
     9   else {
     7     println(s"Visiting: $n $url")
    10     println(s"Visiting: $n $url")
     8     for (u <- get_all_URLs(get_page(url))) 
    11     for (u <- get_all_URLs(get_page(url))) crawl(u, n - 1)
     9       crawl(u, n - 1)
       
    10   }
    12   }
    11 }
    13 }