Download Clojure for the Brave and True: Learn the Ultimate Language by Daniel Higginbotham PDF

By Daniel Higginbotham

For weeks, months?—nay!—from the very second you have been born, you've felt it calling to you. in the end you'll be united with the programming language you've been eager for: Clojure!

As a Lisp-style sensible programming language, Clojure allows you to write strong and stylish code, and since it runs at the Java digital desktop, you could reap the benefits of the sizeable Java environment. Clojure for the courageous and actual bargains a "dessert-first" method: you'll begin fidgeting with actual courses instantly, as you gradually acclimate to the summary yet strong positive aspects of Lisp and practical programming. inside of you'll locate an offbeat, functional consultant to Clojure, full of quirky pattern courses that seize cheese thieves and song glittery vampires.

Learn how to:
- Wield Clojure's middle functions
- Use Emacs for Clojure development
- Write macros to change Clojure itself
- Use Clojure's instruments to simplify concurrency and parallel programming
- Clojure for the courageous and actual assumes no earlier adventure with Clojure, the Java digital laptop, or useful programming. Are you prepared, courageous reader, to fulfill your actual future? seize your most sensible pair of parentheses—you're approximately to embark on an epic trip into the realm of Clojure!
- Covers Clojure 1.7Requires Java 1.6 or later.

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Additional resources for Clojure for the Brave and True: Learn the Ultimate Language and Become a Better Programmer

Example text

1"]]}} 5. Open Emacs. When you open Emacs, you should see a lot of activity as Emacs downloads a bunch of useful packages. Once the activity stops, go ahead and just quit Emacs, and then open it again. After you do so, you should see a window like the one in Figure 2-3. How to Use Emacs, an Excellent Clojure Editor 13 Figure 2-3: How Emacs looks after installing your sweet new configuration Now that we’ve got everything set up, let’s learn how to use Emacs! Emacs Escape Hatch Before we dig in to the fun stuff, you need to know an important Emacs key binding: ctrl-G.

18 Chapter 2 If you open a file and Emacs doesn’t load a major mode for it, chances are that one exists. You’ll just need to download its package. Speaking of which . . Installing Packages Many modes are distributed as packages, which are just bundles of elisp files stored in a package repository. Emacs 24, which you installed at the beginning of this chapter, makes it very easy to browse and install packages. M-x package-list-packages will show you almost every package available; just make sure you run M-x package-refresh-contents first so you get the latest list.

Clj, which you created in Chapter 1. Next, use M-x cider-jack-in. This starts the REPL and creates a new buffer where you can interact with it. After a short wait (it should be less than a minute), you should see something like Figure 2-8. clj file is open on the left, and the REPL is running on the right. If you’ve never seen Emacs split in half like this, don’t worry! I’ll talk about how Emacs splits windows in a second. In the meantime, try evaluating some code in the REPL. Type in the following bolded lines.

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