Chris Bunch Chris Bunch - 1 month ago 9
Ruby Question

Ruby - Passing Blocks To Methods

I'm trying to do Ruby password input with the Highline gem and since I have the user input the password twice, I'd like to eliminate the duplication on the blocks I'm passing in. For example, a simple version of what I'm doing right now is:

new_pass = ask("Enter your new password: ") { |prompt| prompt.echo = false }
verify_pass = ask("Enter again to verify: ") { |prompt| prompt.echo = false }


And what I'd like to change it to is something like this:

foo = Proc.new { |prompt| prompt.echo = false }
new_pass = ask("Enter your new password: ") foo
verify_pass = ask("Enter again to verify: ") foo


Which unfortunately doesn't work. What's the correct way to do this?

Answer

The code by David will work fine, but this is an easier and shorter solution:

foo = Proc.new { |prompt| prompt.echo = false }
new_pass = ask("Enter your new password: ", &foo)
verify_pass = ask("Enter again to verify: ", &foo)

You can also use an ampersand to assign a block to a variable when defining a method:

def ask(msg, &block)
  puts block.inspect
end