Nightcode repl server launch timed out how to#
Nightcode repl server launch timed out code#

Nightcode repl server launch timed out code#

The Java program clojure.jar reads Clojure source code and produces Java bytecode.

Java programs are usually distributed as JAR files.

JAR files are collections of Java bytecode.

Usually, the Java Compiler produces Java bytecode from Java source code.

We’ll explore the relationship between Clojure and the JVM more later on, but for now the main concepts you need to understand are these: Clojure also targets JavaScript and the Microsoft Common Language Runtime (CLR), but this book only focuses on the JVM implementation. Clojure programs are executed within a JVM and rely on the JVM for core features like threading and garbage collection. This distinction is necessary because, unlike most programming languages like Ruby, Python, C, and a bazillion others, Clojure is a hosted language. But now that you’re aware, you’ll be fine. You’ll see Clojure used to refer to both the language and the compiler, which can be confusing if you’re not aware that they’re separate things.

The compiler is an executable JAR file, clojure.jar, which takes code written in the Clojure language and compiles it to Java Virtual Machine ( JVM) bytecode. The Clojure language is a Lisp dialect with a functional emphasis whose syntax and semantics are independent of any implementation. When talking about Clojure, though, it’s important to keep in mind the distinction between the Clojure language and the Clojure compiler. Plus, Clojure gives you better tools for tackling complex domains (like concurrent programming) that are traditionally known to drive developers into years of therapy. Its Lisp heritage gives you the power to write code more expressively than is possible in most non-Lisp languages, and its distinct take on functional programming will sharpen your thinking as a programmer. Using an alloy of Lisp, functional programming, and a lock of his own epic hair, he crafted a language that’s delightful yet powerful. Build the project to create an executable JAR fileĬlojure was forged in a mythic volcano by Rich Hickey.Create a new Clojure project with Leiningen.

Nightcode repl server launch timed out how to#

By the end of the chapter, you’ll know how to do the following: Next, I’ll cover Leiningen, the de facto standard build tool for Clojure. You’ll also learn how to instantly run code within a running Clojure process using a Read-Eval-Print Loop (REPL), which allows you to quickly test your understanding of the language and learn more efficiently.īut first, I’ll briefly introduce Clojure. Reaching that milestone frees you up to experiment, share your work, and gloat to your colleagues who are still using last decade’s languages. It feels great to get a real program running. In this chapter, you’ll invest a small amount of time up front to get familiar with a quick, foolproof way to build and run Clojure programs. Chapter 1 Building, Running, and the REPL