# Alloy Authors - Practical Alloy - Meta-capabilities (Highlights) ![rw-book-cover|256](https://readwise-assets.s3.amazonaws.com/static/images/article1.be68295a7e40.png) ## Metadata **Review**:: [readwise.io](https://readwise.io/bookreview/51349419) **Source**:: #from/readwise #from/reader **Zettel**:: #zettel/fleeting **Status**:: #x **Authors**:: [[Alloy Authors]] **Full Title**:: Practical Alloy - Meta-capabilities **Category**:: #articles #readwise/articles **Category Icon**:: 📰 **URL**:: [practicalalloy.github.io](https://practicalalloy.github.io/chapters/behavioral-topics/topics/meta/index.html) **Host**:: [[practicalalloy.github.io]] **Highlighted**:: [[2025-05-12]] **Created**:: [[2025-05-14]] ## Highlights - all v : var$ | no v.value ([View Highlight](https://read.readwise.io/read/01jv2ag54akg3mskg5qeta30nb)) ^888705872 Initially all mutable elements are empty