algorithm

In computer science, a data structure is a data organization, management, and storage format that enables efficient access and modification. 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.

In mathematics and computer science, an algorithm is a finite sequence of well-defined, computer-implementable instructions, typically to solve a class of problems or to perform a computation. Algorithms are unambiguous specifications for performing calculation, data processing, automated reasoning, and other tasks.

Data Structure

Data Structure Visualizations
Collections-C, A library of generic data structures including a list, array, hashtable, deque etc.. http://srdja.github.io/Collections-C

Algorithm

Online-Judge
JavaScript Algorithms and Data Structures, This repository contains JavaScript based examples of many popular algorithms and data structures. zh-CN
Pygorithm, A Python module to learn all the major algorithms on the go! Purely for educational purposes
算法学习之路
Quicksheet for Algorithms
algo 101+ coding interview problems with detailed solutions, test cases, and program analysis https://hoanhan101.github.io/2020/01/06/101-challenges
Algorithms in the "Real World"

visualization

Hello-Algo
Algorithm Visualizer
VisuAlgo visualising data structures and algorithms through animation

books

Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne
- algs4 Algorithms, 4th edition textbook code and libraries http://algs4.cs.princeton.edu/code/
An Introduction to the Analysis of Algorithms
- a textbook for a first course in computer science for the next generation of scientists and engineers
Algorithms by Jeff Erickson: This web page contains a free electronic version of my self-published textbook Algorithms, along with other lecture notes I have written for various theoretical computer science classes at the University of Illinois, Urbana-Champaign since 1998.
AlgoXY: This book introduces about elementary algorithms and data structure. It includes side-by-side comparison about purely functional realization and their imperative counterpart.