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Factor (programming language)

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Factor is a concatenative programming language designed and implemented by Slava Pestov.

Factor's main influences are Joy, FORTH, and Lisp.

Some of its key features include: 

   * Postfix syntax
   * Dynamic typing
   * Dynamic scoping
   * Primary compound data types are linked lists, vectors, and namespaces (lists of name/value pairs)
   * Rich math library including floating point, ratios, complex numbers
   * Continuations
   * Integrated HTTP server
   * Focus on interactive and test-driven development

There are two implementations of Factor:

  • an interpreter/compiler written in Java
  • a (somewhat incomplete) interpreter written in C
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