How can I filter objects in Ruby?

How can I filter objects in Ruby?

You can use the select method to filter objects in an array based on a condition. For example, array.select { |obj| obj.property == value }.

Can you give me an example with a custom object?

Sure! Suppose you have a class Person with a name and age. You can filter like this:

class Person
  attr_accessor :name, :age
  def initialize(name, age)
    @name = name
    @age = age
  end
end

people = [Person.new('Alice', 30), Person.new('Bob', 20)]

adults = people.select { |person| person.age >= 21 }

What if I want to filter by multiple conditions?

You can combine conditions using logical operators. For example:

adults = people.select { |person| person.age >= 21 && person.name.start_with?('A') }

Is there a way to filter in place?

Yes, you can use the delete_if method to filter the array in place. For example:

people.delete_if { |person| person.age < 21 }