TypeError: can't convert String into Integer
- by demas
I have code:
class Scene
def initialize(number)
@number = number
end
attr_reader :number
end
scenes = [Scene.new("one"), Scene.new("one"), Scene.new("two"), Scene.new("one")]
groups = scenes.inject({}) do |new_hash, scene|
new_hash[scene.number] = [] if new_hash[scene.number].nil?
new_hash[scene.number] << scene
end
When I'm lauching it I get error:
freq.rb:11:in `[]': can't convert String into Integer (TypeError)
from freq.rb:11:in `block in <main>'
from freq.rb:10:in `each'
from freq.rb:10:in `inject'
from freq.rb:10:in `<main>'
If I change scenes to:
scenes = [Scene.new(1), Scene.new(1), Scene.new(2), Scene.new(1)]
the problem dissapear.
Why I get error message in the first case? Why Ruby decide to convert scene.number from String to Integer?
And one additional question about the 'inject' method. When Ruby initialize the 'new_hash' variable and how can Ruby know the type of this variable?
