How to delete an class instance inside of an array in Ruby?

Question

I am trying to remove a Silverware class inside of the @contents array by rewriting the method "remove_item" inside the drawer class. This method should takes a parameter of the name of the @type of the silverware.

class Drawer
attr_reader :contents
    def initialize
        @contents = []
    end
    def add_item(item)
        @contents << item
    end
    def remove_item(item = @contents.pop)
        @contents.delete(item)   # I have to fix this.
    end
end

class Silverware
    attr_reader :type
        def initialize(type, clean = true)
          @type = type
        end
end

silverware_drawer = Drawer.new    # creating new drawer
silverware_drawer.add_item(Silverware.new("spoon"))    # adding silverware
p silverware_drawer.contents    # I get this >> [#<Silverware:0x007f84aa091ad8 @type="spoon",     @clean=true>]

p silverware_drawer.remove_item("spoon")    # removing spoon
p silverware_drawer.contents    # Show drawer and I still get [#<Silverware:0x007f84aa091ad8 @type="spoon",     @clean=true>]

Any helps would be greatly appreciated! Thank you in advance!

usha · Accepted Answer · 2014-08-14 15:29:36Z

1

You are not passing in the object. You are just passing in the type. So you have to find the item with type "spoon" and delete it from the array

def remove_item(item)
   @contents.delete(@contents.find{|content| content.type == item})
end

answered Aug 14, 2014 at 15:29

usha

29.4k5 gold badges75 silver badges94 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Cary Swoveland Over a year ago

or @contents = @contents.reject { |content| content.type == item } or @contents.reject! { |content| content.type == item }; @contents. (Recall that with reject!, nil is returned if no elements are rejected.)

Collectives™ on Stack Overflow

How to delete an class instance inside of an array in Ruby?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related