When should I use blocks or procs in Ruby?

When should I use blocks or procs in Ruby?

In Ruby, blocks are often used for iteration and can be passed to methods, while procs are objects that can be stored and reused. Blocks are more lightweight, but procs offer more flexibility.

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

Sure! A common use case for blocks is with the each method. For example, array.each { |item| puts item } iterates over each item in the array.

What about procs? When would I prefer them?

You might prefer procs when you need to pass around a chunk of code as an object. For instance, you can define a proc and call it multiple times, which is useful for callbacks.

Are there any performance differences between blocks and procs?

Yes, blocks are generally faster because they are not objects and have less overhead. Procs, being objects, have a bit more overhead but offer more functionality.