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Free reference books
PDFs from the Notes for Professionals series, compiled from Stack Overflow Documentation and shared under the CC BY-SA licence.
- Web
HTML5 Notes for Professionals
Semantic elements, forms, media and the APIs built into the browser.
PDF · FreeDownload - Web
JavaScript Notes for Professionals
From variables and functions to closures, promises and async/await.
PDF · FreeDownload - Web
React Notes for Professionals
Components, props, state and hooks, for when you go beyond plain JavaScript.
PDF · FreeDownload - Web
Node.js Notes for Professionals
JavaScript on the server: modules, streams, events and Express.
PDF · FreeDownload - Data
Python Notes for Professionals
Data structures, functions, classes, files and the standard library.
PDF · FreeDownload - Data
R Notes for Professionals
Data frames, statistics and charts with R.
PDF · FreeDownload - Databases
SQL Notes for Professionals
Queries, joins, grouping and database design.
PDF · FreeDownload - Databases
PostgreSQL Notes for Professionals
JSON, full-text search, window functions and more.
PDF · FreeDownload - Databases
MySQL Notes for Professionals
Tables, indexes, stored procedures and performance.
PDF · FreeDownload - Tools
Git Notes for Professionals
Branching, merging, rebasing and working in a team.
PDF · FreeDownload - Tools
Linux Notes for Professionals
The command line, files and permissions, processes and scripts.
PDF · FreeDownload - Tools
Algorithms Notes for Professionals
Sorting, searching, graphs and how to measure speed.
PDF · FreeDownload
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