Here is a Perl Problem that was posed to me. I was given one day time to solve. Unfortunately I did not know enough Perl to do it. And sadly, I did not get selected. However I wish to share this question with all. Please pose your answers or programs on this forum for the benefit of all friends. Submitted by ilangocal.

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Vadivel raja

  • Dec 7th, 2005

i think the problem is straight forward and should be very simple to write a perl program for the same, below is the program. i havent run it to check if it works fine. comments are welcome

1. Assuming table 1 having the address has a structure

address_tbl (mailaddress char(255))

2. Assuming table 2 having the count of domains has a structure

domain_count_tbl (domain char(255), count int)


@maillist = query("select * from address_tbl")

 (name,domain) = split(/@/, myvar[i])

foreach $key (keys %mylist)
 @res = query("select 1 from domain_count_tbl where domain=$key")
 if (scalar(@res) == 0 )
  query(insert into domain_count_tbl values("$key",mylist[$key]))
  query(update domain_count_tbl set count=mylist[$key] where domain="$key")

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