K1Lesson 23 of 49about 180 minutes
Dictionary and HashSet
What you learn in this lesson
- store values under a key and look them up safely with TryGetValue
- know that a dictionary has no reliable order, and print it sorted
- compare keys without caring about upper and lower case
- prevent duplicate entries with a HashSet and compare sets
- choose the right collection for a task
- store contacts by Id in the Kladde and give them tags
This lesson belongs to course K1
You will see this lesson's text and video once you have bought the course. The goals above show what you learn here.
€149.00
incl. VAT, one-time payment
Access to all of the course's lessons with their exercises, solutions and videos on this site, for 24 months from the purchase. A self-study course: no tutoring, no exams or grading by us, and no certificate.
Sign in and buy