Skip to next host in array if an error is thrown - ruby

Question

Say I have an array which is populated with IP addresses. Now say I have a method that tries to connect to each host in the array. In this particular instance I don't need to know any details about the failed connections, I just want to skip to the next host if one fails to connect or if ANY errors are thrown. How do I do this?
The problem I'm having is that, occasionally, when connecting to one of the hosts the program will throw an ENETUNREACH error and then kill the program. I tried solving it by just rescuing the error, but then what happens is the program will just stop executing without throwing any errors. How do I get it to skip the host in the array, and just move on to the next host?
def popen(host)
addr = Socket.getaddrinfo(host, nil)
sock = Socket.new(Socket.const_get(addr[0][0]), Socket::SOCK_STREAM, 0)
begin
sock.connect_nonblock(Socket.pack_sockaddr_in(22, addr[0][3]))
rescue Errno::EINPROGRESS
resp = IO.select(nil, [sock], nil, #timeout.to_i)
if resp.nil?
false
end
begin
if sock.connect_nonblock(Socket.pack_sockaddr_in(22, addr[0][3]))
sshlog(host, #user, #pass)
end
rescue Errno::ECONNREFUSED
false
end
end
sock
end
That is the connect method. And this:
def randIP
begin
threads = []
if #arg1 =~ /^([1-9][0-9]{0,2}|1000)$/
t1 = Time.now
s = 1
while s <= #arg1.to_i do
#host_arr << Array.new(4){rand(254)}.join('.')
s += 1
end
#host_arr.each do |ip|
threads << Thread.new do
begin
popen(ip)
rescue Errno::ENETUNREACH
end
end
end
threads.each do |thread|
thread.join
end
t2 = Time.now
time = t2 - t1
STDOUT.puts "done"
proxylst(#res_arr, #user, #pass)
else
puts "Host range too large! Must be a number between 1 and 1000."
end
rescue
false
end
end
Is a method that generates random IP addresses, puts them into an array, and uses the popen method above to attempt a connection on each host. Considering the nature of random IP address generation, chances are at least one out of 1000 hosts is going to be either invalid, or unreachable in some way. So what I need is a way to try every host in the array skipping any that throw errors.

Answer 1

typically how I handle this is like so:
exception_array = []
Connections.each do |con|
begin
#connection code
rescue Exception => e
exception_array << e
end
end
unless exception_array.empty?
msg = ""
exception_array.each do |e|
msg << e.to_s
end
raise msg
end
This way you keep track of all exceptions that were thrown without breaking the code on a failure.