No results.

NewCrafts Videos

Created by developers for developers, NewCrafts is an ephemeral learning ground for professional developers who care for quality code and bettering their practices. Get more on

Bodil Stokke-Mukanren : Running the little things backwards

Relational programming, or logic programming, is a paradigm that exhibits remarkable and powerful properties, to the extent that its implementation seems frightfully daunting to the layman. µKanren is a minimal relational language that seeks to strip the paradigm down to its core, leaving us with a succinct and elegant set of primitives on top of which we can rebuild even the most powerful relational constructs.

In this talk, we will explore the µKanren language by implementing it from first principles in a simple functional programming language, going on to demonstrate how you can assemble these simple building blocks into a semblance of its richer parent, miniKanren, and maybe solve a logic puzzle or two to make sure it's working as advertised.

The µKanren paper, and the original µKanren implementation, were authored by Jason Hemann and Daniel P. Friedman. The paper is available at, and the Scheme implementation at