December 29, 2025

Using Optics for Lexicographic Sorting in Elixir

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Using Optics for Lexicographic Sorting in Elixir

Source: joekoski.com

This article explains how to utilize optics, such as Lenses and Prisms, to perform lexicographic sorting in Elixir. It starts with a setup using transaction data, then demonstrates sorting strategies by extracting and projecting specific keys like name and amount from data structures. The author introduces the concept of combining sorting orders using `Ord` and contrasts it with traditional `Enum.sort` methods. Throughout, composition and declarative ordering are emphasized to simplify complex sorting logic. By exploring both basic and advanced examples, the piece illustrates the flexibility and power optics offer for structuring and manipulating data in Elixir.

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