Join Arthur Ulfeldt for an in-depth discussion in this video Understand the reference types, part of Learning Clojure.
- Now let's go through each of the reference types…in a little more detail.…Refs are the most interesting of the reference types…because they allow you to…have coordinated changes between multiple items.…So, at its base, a reference, or Ref,…is a data structure that you can put a value in,…and you can change that value later,…and come back and it'll still be there.…This happens in a way that is safe…to allow coordinated updates between…several of these simultaneously.…So Refs are changed through transactions.…
You create a transaction,…change a bunch of references in it,…they either all change or they don't.…It's synchronous.…Within your transaction, when you update a ref,…the next line can look at the value of Ref…and it ill definitely see the new value…that it just put there.…An interesting effect of this,…is Clojure doesn't use direct locking…on these references, it doesn't stop anyone else…from attempting to change them while you're changing them.…What it does is it uses a strategy called…Opportunistic Retries.…
Arthur Ulfeldt covers the Leiningen build tool and setting up Clojure to work with the IntelliJ IDEA dev environment. He then reviews the basics of the syntax, including functions, expressions, values, macros, strings, and conditionals. He shows how to structure, compile, and deploy Clojure projects in Leiningen, and pull from Clojure's core library. In the final chapters, Arthur explores references and namespaces and points to resources to learn more about Clojure.
- Installing Leiningen
- Configuring IntelliJ IDEA
- Using REPLs to execute code
- Working with simple and composite values
- Mastering Clojure macros
- Exploring Clojure syntax
- Building a Clojure project with Leiningen
- Mapping, filtering, and reducing
- Binding and destructuring data
- Working with identities
Skill Level Intermediate
Java Essential Training for Studentswith Peggy Fisher3h 6m Intermediate
1. First Look at Clojure
2. Exploring the Syntax of Clojure
Conditionals and special forms10m 27s
3. Evaluating Forms
4. Clojure Projects and Leiningen
5. The Core Library
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