What are some examples of using blocks in Ruby?

What are some examples of using blocks in Ruby?

In Ruby, blocks are chunks of code that can accept input and be executed. For example, you can use a block with the each method to iterate over an array.

Can you show me a specific example with an array?

Sure! Here's an example:

array = [1, 2, 3, 4]
array.each do |number|
  puts number * 2
end

This will output 2, 4, 6, and 8.

What about using blocks with methods?

You can define a method that takes a block as an argument. For example:

def greet
  yield
end

greet { puts 'Hello, world!' }

This will print 'Hello, world!'.

Are there any other ways to use blocks?

Yes! You can also use blocks with map, select, and many other enumerable methods to manipulate collections.