For us Java developers, an associative array is the Map interface. Here is the definition from Wikipedia: "An associative array, map, symbol table, or dictionary is an abstract data type composed of a collection of (key, value) pairs, such that each possible key appears at most once in the collection." The same thing is true of associative arrays. In Scala it is called " LinkedList", just like in Java.Ī linked list is one of the basic common data structures, so you will find that it is implemented in any modern programming language. ![]() In Java, the "linked list" data structure is implemented by the LinkedList class.īut other languages also implement linked lists! In Python, this data structure is called " llist". That describes our beloved LinkedList, doesn't it? Instead, each element points to the next." "A linked list is a linear collection of data elements, whose order is not given by their physical placement in memory. Perhaps its definition will seem familiar to you :) You can go to Wikipedia and read about how it works and what advantages and disadvantages it has. They are simply abstract "blueprints" that each programming language uses to create its own classes or implementations of a particular structure.įor example, one of the most famous data structures is a linked list. It is very important to understand that data structures are not tied to any particular language. And you are also familiar with Map (this data structure may also be referred to as a "dictionary" or "associative array"). When solving specific problems, very often the most important thing is to choose the most suitable data structure for the problem.Īnd you are already familiar with many of them! For example, you know about arrays. ![]() ![]() In programming, there are a huge variety of data structures. More precisely, a data structure is a collection of data values, the relationships among them, and the functions or operations that can be applied to the data." The definition is a bit confusing, but its gist is clear.Ī data structure is a kind of repository where we store data for future use. Wikipedia says: "A data structure is a data organization, management, and storage format that enables efficient access and modification. Hi! Today we'll talk about something that is super important for any programmer: data structures.
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