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### Recursion, Algorithms and Data Structures

Here are some questions for you:

Did you learn your recursion in school or somewhere online but you did not make it

more that fibonnaci numbers?

Do you need algorithms to solidify your understanding of recursion?

Do you want to get better at functional programming?

Do you want to understand how to use recursion on multiple data structures?

Do you want to learn what is recursive leap of faith? (more on that in later chapter)

If there is one yes answer you are on right place.

In this book I will teach you how to use recursion with data structures and basic

data types. We will use JavaScript programming language. You can use any one

that you like. But its better to use some that is functional oriented. (Scala,

JavaScript etc…)

Pavle Paunović

JavaScript Librarian experienced in building Single Page Web Applications. Pavle have years of experience in modern JavaScript/Front End Development.

## Chapter 1: Arrays

• Print each value of array with recursion
• Sum the array of numbers
• Find max number in array
• Find min number in array
• Check if array is sorted
• Check if array contains a value
• Reverse an array
• Remove duplicates
• Second largest in array
• Merge two array

## Chapter 2: Maps

• Letter frequency counter
• Map size
• Check if there are duplicates in array using map
• First unique character in string using map
• Find the indexes in array of values that add to certain number
• Valid anagram

• Append new node to linked list
• Find middle of linked list
• Highest number in the linked list
• Remove node from linked list
• Remove duplicate from linked list

## Chapter 4: Doubly linked lists

• Append to doubly linked list value
• Delete node by value in doubly linked list

## Chapter 5: Sets

• Unique elements
• Find union of arrays using Set
• Remove duplicates from array with Set
• Find intersection of two arrays
• Union of two Sets
• Check equality of two sets
• Difference between two sets

## Chapter 6: Stack

• Reverse string with stack
• Next greater element

## Chapter 7: Queue

• Implement queue data structure
• Reverse the order of elements in queue
• Generate binary number using queue

## Chapter 8: Binary tree

• Create binary tree
• Binary tree traversal
• Insert node in binary tree
• Reverse binary tree
• Maximum value in binary tree
• Path Sum (If binary tree matches sum)

## Chapter 9: Graphs

• Depth-First-Search (DFS) graph traversal
• Shortest path with recursion
• Connected components

## Final Words

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