Hands-On Design Patterns and Best Practices with Julia

Calculating the average score for the top N stories

Now that we have the ability to find the top stories and retrieve details about each story, we can create a new function to calculate an average score from the top N stories.

The average_score function is as follows:

using Statistics: meanfunction average_score(n = 10)    story_ids = fetch_top_stories()    println(now(), " Found ", length(story_ids), " stories")    top_stories = [fetch_story(id) for id in story_ids[1:min(n,end)]]    println(now(), " Fetched ", n, " story details")    avg_top_scores = mean(s.score for s in top_stories)    println(now(), " Average score = ", avg_top_scores)    return avg_top_scoresend

There are three parts to this function:

1. The first part finds the story IDs for top stories using ...