1.2 Lenses on Built-In Datatypes🔗ℹ

This library provides lenses for most built-in Racket datatypes. In general, the name of each lens corresponds to the name of its accessor function with -lens appended to the end. For example, the lens for accessing the first element of a pair is car-lens, and the lens for accessing an element of a hash is called hash-ref-lens.