Conditional blocks in Ruby

Question

Say I have function with_foo that takes a block, and wrap it around a piece of code, like

with_foo do
  puts "hello!"
end

Now I would like to make the wrapping conditional, like

if do_with_foo?
  with_foo do
    puts "hello!"
  end
else
  puts "hello!" # without foo
end

Is there any way to write this shorter/more elegantly, meaning without having to repeat the code puts "hello!"?

Answer 1

if you are willing to specify argument with a block, it is possible.

given with foo above, you can write such snippet:

whatever = proc {puts "hello"}
#build a proc object with a block
if do_with_foo?
  with_foo &whatever
#pass it to with_foo
else
  whatever.call
#normally call it
end