Ruby said:
Hello,
I need a module for sending emails.
Could you show me where I can find it and what's the syntax?
Thanks.
Have fun!
require 'net/smtp'
Net::SMTP.start('smtp.example.com', 25) do |smtp|
smtp.open_message_stream('from_addr', [to_addr]) do |f|
f.puts 'From: (e-mail address removed)'
f.puts 'To: (e-mail address removed)'
f.puts 'Subject: test message'
f.puts 'This is a test message.'
end
end
Thanks, that works.
But from syntax point to see, what's Net::SMTP.start('smtp.example.com', 25)?
why it can accept a block as argument?
Because it the #start method was written that way.
The reason, I imagine, is to provide some failure resistance: If a code
gets exited, the environment gets "reset" (DB connections get closed,
files written to disk, etc).
what's the content of "smtp"?
Take a look at it with smtp.inspect in the block.
why "smtp" (it seems being taken from God) has the method of
"open_message_stream"?
smtp is a block variable (the | at each side tells Ruby that).
Since smtp is a block variable in a Net::SMTP block, it gains access to
the methods Net::SMTP provides to its blocks.
You could've named the block variable |s| or |richard|, and the methods
would still work.
It makes life easier if the variable's name tells you what it does when
you read the name.
and what other methods it does also have?
smtp.methods
Sorry for my newbie questions.
A handy tip I use when I explore something new:
You can #inspect objects or check its #methods in Ruby, and #sort the
output. A simple "puts Class.methods" shows you, in the terminal / on
the command line which methods the class Class has. "puts
Class.methods.sort" sorts the output for you (alphabetically in this case).
