Xah Code

Download entire Xah Code for offline reading. Free update every year.

Siphon my knowledge into your brain; assimilate my sensibilities to your spine.

Math and Programing, tutorials and essays. There are ~4 thousand articles.

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Be my patreon. You, Do it. https://www.patreon.com/xahlee

recent goodies

grin cat princess alien unicode 06726 Unicode

the day i lost control
Keyboard, Layouts, RSI

Programing Tutorials

js logo
JavaScript in Depth
visual css s
Visual CSS
HTML5 logo black
HTML
svg logo h
SVG in 1 hour
python logo
Python by Example
Ruby logo
Ruby by Example
perl camel
Perl by Example
PHP logo
PHP Basics
xah java logo
Java
golang gopher
Go
clojure logo
Clojure
Linux Logo in Linux Libertine Font
Practical Linux
git logo
Practical git in 1 Hour
subversion logo new
svn
emacs logo
Emacs
LISP logo
Emacs Lisp
OCaml Logo
OCaml
xah powershell logo
PowerShell
Mathematica 2 logo 11261
Mathematica

Programing Language Design

programing mylisp
Programing Language Syntax Soup

more programing related stuff at Hacker Cult

Math

hypotrochoidGen2
Visual Dictionary of Special Plane Curves

wavy enneper
Surface Gallery

TransitivityOfRotation
Wallpaper Groups

sq squarly weave-p
Math Graphics Gallery

Index: Xah Math


Testimonials

Printed Citations to Xah Lee Site

Just need to say. I love @xah_lee website. Choc full of useful info of useful information.

2017-04-23 https://twitter.com/fleontrotsky/status/856217970913271809

A lot of content here: http://xahlee.info/index.html Very impressive! By @xah_lee

2017-04-19 https://twitter.com/leifbattermann/status/854592033452945409

Yep. I'm Nigerian programmer living in Nigeria. I really enjoy your articles on ergonomics, emacs, programming languages etc

2017-04-20 https://twitter.com/SegunOlulana/status/855047691692199936