Question

I wrote this simple class

class FibSequence
    include Enumerable


    def initialize(num) 
        @sequence = fib(num)
    end

    def fib(n)
        vals = [1, 1]
        return [1] if n == 1
        return vals if n == 2

        (n-2).times do 
            vals.push(vals[-1] + vals[-2]) 
        end
        return vals
    end

    def each(&block)
        @sequence.each(&block)
    end

end

when I call it like this:

f = FibSequence.new(6)

f.reject { |s| s.odd? }

f.each { |s| print(s,’:’) }

I expect => [2, 8]
but I get => 1:1:2:3:5:8:

Answer 1

Ruby’s reject method does return the result as new array. You thus have to write

f = f.reject { |s| s.odd? }

.