Clojure · Expert

Lesson 1 · On the house

Macro hygiene

Symbol capture, auto-gensym x#, gensym, and evaluating arguments once.

Lesson 2

Writing transducers

The reducing-function protocol: init, step, completion, and volatile! state.

Lesson 3

Persistent data and transients

HAMTs and 32-way tries, structural sharing, and transient! batching.

Lesson 4

clojure.spec

s/def, s/keys, s/valid?, s/explain-data, conform, and fdef for functions.

Lesson 5

Dynamic vars and metadata

^:dynamic, binding, alter-var-root, with-redefs, and metadata on vars and values.

Lesson 6

core.async patterns

alts! with timeouts, pipelines, mult/tap fan-out, and back-pressure.

Lesson 7

deftype, reify and performance

deftype with mutable fields, reify for anonymous impls, type hints and primitives.

Lesson 8

Datafy, nav and tap>

Turning objects into data, navigating lazily, and tap> for live inspection.

Lesson 9

Tooling: deps.edn aliases and builds

Aliases with -M/-X/-T, tools.build uberjars, and REPL-driven workflow.

Lesson 10

Concurrency design at scale

Choosing atoms, refs, agents, core.async or executors for a workload.