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Ruby Ruby Blocks Working With Blocks Block Method Practice: Custom Classes

Jenna Williams
Jenna Williams
448 Points

Trouble with challenge 2 of 2

I have no idea how to get past this part, despite many attempts and rewatching the video...

simple_benchmarker.rb
class SimpleBenchmarker
  def run(description, &block)
    start_time = Time.now
    block.call
    end_time = Time.now
    elapsed = end_time - start_time

    puts "\n#{description} results"
    puts "Elapsed time: #{elapsed} seconds"
  end
end

benchmarker = SimpleBenchmarker.new
benchmarker.run do 
  puts "#{description}" 
  5.times do
      puts "Hiya"
  end
end

2 Answers

William Li
PLUS
William Li
Courses Plus Student 26,867 Points

Hi, Jenna Williams , you see, here def run(description, &block), the run method was defined to take one argument description, and a block.

So when calling this method, you need to supply a description argument, otherwise it'll give you an ArgumentError exception.

benchmarker.run "whatever description" do
  5.times do
    puts "Hiya"
  end
end

this should fix it.

jocelyn alsdorf
jocelyn alsdorf
22,454 Points

Geez I was so stuck on this one too. Thanks for the help.

William Li
William Li
Courses Plus Student 26,867 Points

you're welcome, jocelyn alsdorf , I'm glad you find this answer helpful :P

Jenna Williams
Jenna Williams
448 Points

Aha, thank you! For some reason my brain said I had to call the description from above.