pliers

A tiny library that makes it easier to call anonymous functions from threading macros. Inspired by then and tap in Elixir.

Usage

The pliers/then> and pliers/then>> macros allow calling an anonymous function from a threading macro, using its return value.

user> (-> 1 (pliers/then> (fn [v] (< 0 v 2))))
true
user> (-> 1 (pliers/then> #(< 0 % 2)))
true
user> (->> 1 (pliers/then>> (fn [v] (< 0 v 2))))
true
user>> (->> 1 (pliers/then>> #(< 0 % 2)))
true

The pliers/tee> and pliers/tee>> macros allow calling an anonymous function from a threading macro for its side effects, throwing away its return value.

user> (-> 1 (pliers/tee> (fn [v] (println "My number is" v))))
My number is 1
1
user> (-> 1 (pliers/tee> #(println "My number is" %)))
My number is 1
1
user> (->> 1 (pliers/tee>> (fn [v] (println "My number is" v))))
My number is 1
1
user>> (->> 1 (pliers/tee>> #(println "My number is" %)))
My number is 1
1

Development

Run the project's tests (they'll fail until you edit them):

$ clojure -T:build test

Run the project's CI pipeline and build a JAR (this will fail until you edit the tests to pass):

$ clojure -T:build ci

This will produce an updated pom.xml file with synchronized dependencies inside the META-INF directory inside target/classes and the JAR in target. You can update the version (and SCM tag) information in generated pom.xml by updating build.clj.

Install it locally (requires the ci task be run first):

$ clojure -T:build install

Deploy it to Clojars -- needs CLOJARS_USERNAME and CLOJARS_PASSWORD environment variables (requires the ci task be run first):

$ clojure -T:build deploy

Your library will be deployed to dev.chrisodonnell/pliers on clojars.org by default.

License

Copyright © 2023 Chris O'Donnell

Distributed under the MIT license