Clojure Programming by Chas Emerick, Brian Carper, Christophe Grand

By Chas Emerick, Brian Carper, Christophe Grand

Clojure is a pragmatic, general-purpose language that gives expressivity rivaling different dynamic languages like Ruby and Python, whereas seamlessly making the most of Java libraries, providers, and the entire assets of the JVM environment. This publication is helping you study the basics of Clojure with examples pertaining to it to the languages you recognize already, within the domain names and issues you're employed with on a daily basis. See how this JVM language may help dispose of pointless complexity out of your programming perform and open up new concepts for fixing the main not easy problems.

Clojure Programming demonstrates the language’s flexibility through exhibiting the way it can be utilized for universal projects like net programming and dealing with databases, up via extra not easy functions that require secure, potent concurrency and parallelism, facts research, and extra. This in-depth glance is helping tie jointly the total Clojure improvement event, from how you can set up your venture and an advent to Clojure construct tooling, to an educational on the best way to utilize Clojure’s REPL in the course of improvement, and the way to install your accomplished program in a cloud environment.

* use Clojure whereas leveraging your funding within the Java platform
* comprehend the benefits of Clojure as a good Lisp for the JVM
* See how Clojure is used this day in numerous functional domain names
* notice how Clojure gets rid of the necessity for lots of verbose and intricate layout styles
* installation huge or small internet purposes to the cloud with Clojure

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You should refer to the prior comprehensive discussion of destructuring to remind yourself of the full range of options available; here, we’ll discuss just a couple of destructuring idioms that are particularly common in conjunction with functions. Variadic functions. Functions can optionally gather all additional arguments used in calls to it into a seq; this uses the same mechanism as sequential destructuring does when gathering additional values into a seq. Such functions are called variadic, with the gathered arguments usually called rest arguments or varargs.

The Reader | 17 Comments There are two comment types that are defined by the reader: • Single-line comments are indicated by prefixing the comment with a semicolon (;); all content following a semicolon is ignored entirely. These are equivalent to // in Java and JavaScript, and # in Ruby and Python. • Form-level are available using the #_ reader macro. This cues the reader to elide the next Clojure form following the macro: (read-string "(+ 1 2 #_(* 2 2) 8)") ;= (+ 1 2 8) What would have been a list with four numbers—(+ 1 2 4 8)—yields a list of only three numbers because the entire multiplication form was ignored due to the #_ prefix.

This cues the reader to elide the next Clojure form following the macro: (read-string "(+ 1 2 #_(* 2 2) 8)") ;= (+ 1 2 8) What would have been a list with four numbers—(+ 1 2 4 8)—yields a list of only three numbers because the entire multiplication form was ignored due to the #_ prefix. Because Clojure code is defined using data structure literals, this comment form can be far more useful in certain cases than purely textual comments that affect lines or character offsets (such as the /* */ multiline comments in Java and JavaScript).

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