JavaScript arrays

Right now I am working on the JavaScript30 days’ challenge. I have completed episode 4, which is the Array cardio day 1. In the video, Wes explains each array exercise like Array.prototype.filter(),, Array.prototype.reduce(), and some other intense exercises like create a list of Boulevards in Paris that contain ‘de’ anywhere in the name. I’m alright working on these exercises during the course but would like more exercises to test me, without watching any tutorial videos or searching online… unless I am really struggling. Anyway, for anyone who have completed this course/challenge or anyone that might know a good source to help me please tell me. Any ideas of what I can do to test my knowledge of arrays would be massively appreciated! Quite shaky working arrays so want to keep working and working the arrays until I feel comfortable.

Many Thanks.

something like this?

and more here