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Data Structures

Data structures organize information so programs can store, access, and update it efficiently.

What Are Data Structures​

Common data structures include arrays, linked lists, stacks, queues, hash maps, trees, graphs, and heaps.

Choosing the right structure affects speed, memory use, and code clarity.

How To Use Data Structures​

Pick a structure based on the operations your program needs most often, such as lookup, insert, delete, sort, or traversal.

Basic Example​

const usersById = new Map();

usersById.set(1, {name: "Tiew"});
console.log(usersById.get(1));

Common Concepts​

  • Arrays store ordered values.
  • Hash maps optimize key-based lookup.
  • Trees represent hierarchy.
  • Graphs represent relationships.

What To Learn Next​

Learn time complexity, space complexity, stacks, queues, maps, sets, trees, graphs, and heaps.