What is the difference between blocks and procs in Ruby?

What is the difference between blocks and procs in Ruby?

In Ruby, blocks are anonymous pieces of code that can accept input, while procs are objects that encapsulate blocks.

Can you give me an example of how to use a block?

Sure! Here's a simple example:

[1, 2, 3].each do |num|
  puts num * 2
end

This block doubles each number in the array.

And how about using a proc?

Here's how you can use a proc:

double = Proc.new { |x| x * 2 }
puts double.call(4)

This will output 8.

Are there any performance differences between them?

Yes, blocks are generally faster since they are not objects, while procs have some overhead due to being objects.