Lessons

"Well, how is your processor?" "It's OK. I sat in liquid nitrogen for an hour, so now I'm as good as new!" "Great. Then let's continue." "Set collections." Mathematically speaking, a set is a group of unique elements. Thus, in programming, a Set is a collection of unique elements, i.e. a collection that doesn't let you store identical elements. "I don't know if Ellie showed you Set's inheritance hierarchy. If not, here it is ..."

Tasks | Level 6 | Lesson 10

"Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..."

"Hi, Amigo! Here are a couple of additional articles for this level..."

"Hi, Amigo!" "Hi, Julio." "Here's an interesting fact for you: the human brain is capable of storing between 3 and 1,000 terabytes of information." "I'm curious what takes up all of that space in your head, Julio?" "What take up that space? Interesting videos. Now it's time to fill the next 100 megabytes. I just happen to have found a suitable video ,,."

"Hi, Amigo!"

"Hi, Amigo!" "Hello, Captain Squirrels, sir!" "You have a new secret mission today. In order to encrypt correspondence between our units, you need to implement your own URL shortener service." "Cool! Uhh, I mean, I am ready, sir. But why do we need this?" "What do you mean why? Soldier, we're surrounded by enemies. We need to protect our lines of communication. Proceed to the task ..."

You've reached Level 37

"Hi, Amigo!" "Hi, Bilaabo!" "Our topic today won't merely be interesting — it will be downright epic." "Today I'm going to you what design patterns are." "Cool! I've heard a lot about them. I can't wait!" "Experienced programmers have to write a lot of classes. But the most difficult part of this job is deciding which classes to create and how to divide the work among them ..."

"Hello, friend!" "Hi, Bilaabo!" "We still have some time left, so I'll tell you about three more patterns." "Three more? How many are there in all?" "There are currently dozens of popular patterns, but the number of «successful solutions» is unlimited." "I see. So I have to learn several dozen patterns? ..."

"Hi, Amigo!" "Hi, Ellie!" "Today I want to tell you about iterators." "Iterators were invented practically at the same time as collections. The main purpose of collections is to store elements, and the main purpose of an iterator is to retrieve these elements one by one." "What's so difficult about getting a set of elements?" "First, the elements in some collections, such as Set, don't have ..."

"Hi, buddy. Here's an interesting task for you." "Wait, I'm getting a call" "Hello? Uh-huh... Yes... Factory... What about this factory??? Hello? Hello?" "Amigo, the captain called and said something about some factory and a secret agent. You're my friend, right? Go to this Agent IntelliJ IDEA and find out what's up with the factory. But, shh! Don't tell anyone." "Yes, I know the secret agent ..."