Factor - Programming language

Factor is an open source programming language created in 2003 by Slava Pestov.

#150on PLDB

21Years Old

201Repos

Download source code:

git clone https://github.com/factor/factor

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Factor is a stack-oriented programming language created by Slava Pestov. Factor is dynamically typed and has automatic memory management, as well as powerful metaprogramming features. The language has a single implementation featuring a self-hosted optimizing compiler and an interactive development environment. Read more on Wikipedia...

Tags: programming language
Factor is developed on GitHub and has 1,602 stars
There are at least 201 Factor repos on GitHub
Early development of Factor happened in https://github.com/factor
Factor is written in XML, C++, Lisp, C, HTML, CSS, GLSL, Vim script, CSV, JavaScript, Markdown, CSON, Assembly language, JSON, Bourne shell, SQL, CUDA, YAML, reStructuredText, Smalltalk, SVG, Perl, Make, DTD, Objective C++, Lua, Nix, Ruby, Rust
The Google BigQuery Public Dataset GitHub snapshot shows 110 users using Factor in 111 repos on GitHub
There are 50 Project Euler users using Factor
Explore Factor snippets on Rosetta Code
Factor appears in the TIOBE Index
CodeMirror package for syntax highlighting Factor
Pygments supports syntax highlighting for Factor
GitHub supports syntax highlighting for Factor
factorcode.org was registered in 2005
See also: (17 related languages) Linux, Joy, Forth, Lisp, Self, Java, Scheme, C, Java Bytecode, Reverse Polish notation, XML, OpenGL, PostgreSQL, SQLite, Objective-C, Fortran, Smalltalk
Read more about Factor on the web: 1.
1 PLDB concepts link to Factor: Interleaved Notation

Example from Riju:

IN: main
USE: io

"Hello, world!" print

Example from hello-world:

USING: io ;
"Hello World" print

Example from Wikipedia:

: make-html ( string -- xml )
    dup
    <XML
        <html>
            <head><title><-></title></head>
            <body><h1><-></h1></body>
        </html>
    XML> ;

Language features

Feature	Supported	Example	Token
Strings	✓	"Hello world"	"
Print() Debugging	✓		print
Macros	✓
Garbage Collection	✓
Comments	✓
Semantic Indentation	X