Hello,
This is my first post, and i hope i use the correct topic.
There are two errors i do not understand in the code below
I’ve commented out the line that don’t work, and the line directly below
works just fine
Finally i put the errors when using the problematic lines
I do not see any errors in the commented line, if someone do i’ll be
happy to understand what is wrong
thx in advance
Here is the code
class Item
attr_reader :name, :price
def initialize name, price
@name, @price = name, price
end
def + item
price + item.price if item.respond_to? price #### 1
price + item.price if item.is_a? Item
end
end
class Items
def initialize
@items = []
end
def << item
@items << item if item.is_a? Item
end
def price
@items.collect { |i| i.price }.inject(:+)
@items.inject(:+) #### 2
end
end
i = Items.new
i << Item.new(‘a’, 1)
i << Item.new(‘b’, 2)
i << Item.new(‘c’, 3)
puts i.price
The errors
1
./test2.rb:11:in `respond_to?’: 1 is not a symbol (TypeError)
2
./test2.rb:25:in `+’: Item can’t be coerced into Fixnum (TypeError)
