How can I use Ruby to filter an array?

How can I use Ruby to filter an array?

You can use the select method to filter an array in Ruby. For example, array.select { |item| item > 10 } will return all items greater than 10.

Can you show me a complete example?

Sure! Here's a complete example:

numbers = [1, 2, 3, 11, 12, 13]
filtered_numbers = numbers.select { |num| num > 10 }
puts filtered_numbers

This will output [11, 12, 13].

What if I want to filter based on a condition?

You can modify the block inside select. For instance, to filter even numbers:

even_numbers = numbers.select { |num| num.even? }

This will give you all even numbers from the array.

Is there a way to filter in place?

Yes! You can use the delete_if method to filter an array in place. For example:

numbers.delete_if { |num| num < 10 }

This will remove all numbers less than 10 from the original array.