What are blocks in Ruby on Rails?

What are blocks in Ruby on Rails?

Blocks in Ruby are chunks of code that can accept input and be executed. They are often used in methods to provide functionality.

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

Sure! In Rails, you might use a block with the each method to iterate over a collection. For example: users.each do |user| puts user.name end.

What is the difference between a block and a proc?

A block is an anonymous piece of code that can be passed to methods, while a proc is an object that encapsulates a block and can be stored in a variable.

Are there any performance considerations when using blocks?

Yes, using blocks can sometimes lead to performance overhead, especially if they create closures. It's best to use them judiciously.