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Fix average working time for nil values and empty filtered collections

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Maximilian Grundke
2018-07-10 12:43:13 +02:00
parent 494029f2e9
commit 71a78a2dfa
1 changed files with 13 additions and 4 deletions
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17
lib/tasks/detect_exercise_anomalies.rake
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@ -61,16 +61,25 @@ namespace :detect_exercise_anomalies do
.having('count(exercises_with_submissions.id) > ?', number_of_exercises) .having('count(exercises_with_submissions.id) > ?', number_of_exercises)
end end
def find_anomalies(collection) def collect_working_times(collection)
working_times = {} working_times = {}
collection.exercises.each do |exercise| collection.exercises.each do |exercise|
puts "\t\t> #{exercise.title}" puts "\t\t> #{exercise.title}"
working_times[exercise.id] = get_average_working_time(exercise) working_times[exercise.id] = get_average_working_time(exercise)
end end
average = working_times.values.reduce(:+) / working_times.size working_times
working_times.select do |exercise_id, working_time| end
working_time > average * MAX_TIME_FACTOR or working_time < average * MIN_TIME_FACTOR
def find_anomalies(collection)
working_times = collect_working_times(collection)
values = working_times.values.reject {|value| value.nil?}
if working_times.size > 0
average = values.reduce(:+) / working_times.size
return working_times.select do |_, working_time|
working_time > average * MAX_TIME_FACTOR or working_time < average * MIN_TIME_FACTOR
end
end end
{}
end end
def get_average_working_time(exercise) def get_average_working_time(exercise)