Brief overview of the "data structures" and "algorithms" concepts. Watch the video lesson from Svetlin Nakov and learn more at: https://softuni.org/dev-concepts/what-are-data-structures-and-algorithms

1. Dev Concepts
What are Data
Structures and
Algorithms?
Brief

2. 2
 Data structures are representations of data in the computer
memory, which allow efficient access and modification
 Linear data types: arrays, lists, stacks, queues
Data Structures
… … … … …
0 1 2 3 4
Array / list
(indexed group of elements)
Linked list
(sequence of linked elements)
Queue

3.  List of numbers, representing a sequence of income amounts:
 Adding a new income:
 Modifying an existing income:
List of Numbers – Example
var incomes = [
150, 200, 70.50, 120
];
Element Value
incomes[0] 150
incomes[1] 200
incomes[2] 70.50
incomes[3] 120
incomes.push(300);
incomes[4] 300
incomes[1] = 250;
250
3

4. Live Demo
List of Numbers
https://repl.it/@nakov/list-example-js

5. 5
 Trees and tree-like data structures
 Each node holds data + list of
child nodes + parent node
Trees and Traversal Algorithms
C:
Programs Users Windows
Peter
Maria George
 Tree traversal algorithms
 Depth-First Search (DFS)
 Breadth-First Search (BFS)
DepthFirstSearch(node) {
print(node);
for each ch in node.childNodes
DepthFirstSearch(ch)
}

6. Live Demo
Recursive Traversal
of the File System
https://repl.it/@nakov/traverse-folders-cs

7.  …
 …
 …
Next Steps
 Join the SoftUni "Learn To Code" Community
 Access the Free Dev Lessons
 Get Help from the Mentors
 Meet the Other Learners
https://softuni.org

8.  …
 …
 …
Join the SoftUni Community
softuni.o
rg