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exercise

Creating lambda functions

Do you recall the three vectors visit_a, visit_b and visit_c from the A/B test from the last exercise? They are still available in your workspace.

Remember that these vectors contain the hourly visit rate by day. Each element of these vectors corresponds to one design of the website, randomly served to the visitors. We are going to turn these vectors into a daily number of visits, but this time, we'll use a mapper.

Using a mapper allows you to write reusable code: you will potentially be asked to redo this task, so if you have an already existing mapper, you will be able to reuse this object, instead of copying and pasting the same code again and again.

Instruktioner

100 XP
  • Get the daily number of visits by mapping an anonymous function on visit_a.
  • Make this code more concise by using a mapper.
  • Create a reusable mapper object called to_day.
  • Call to_day on the three vectors (make three calls).