Chas Emerick, Brian Carper, Christophe Grand's Clojure Programming PDF

By Chas Emerick, Brian Carper, Christophe Grand

ISBN-10: 1449394701

ISBN-13: 9781449394707

Clojure is a pragmatic, general-purpose language that provides expressivity rivaling different dynamic languages like Ruby and Python, whereas seamlessly benefiting from Java libraries, companies, and the entire assets of the JVM environment. This booklet is helping you examine the basics of Clojure with examples concerning it to the languages you recognize already, within the domain names and subject matters you're employed with each day. See how this JVM language might help get rid of pointless complexity out of your programming perform and open up new techniques 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 internet programming and dealing with databases, up via extra challenging functions that require secure, powerful concurrency and parallelism, info research, and extra. This in-depth glance is helping tie jointly the complete Clojure improvement event, from the way to arrange your undertaking and an creation to Clojure construct tooling, to an instructional on find out how to utilize Clojure’s REPL in the course of improvement, and the way to install your accomplished software in a cloud environment.

* how one can use Clojure whereas leveraging your funding within the Java platform
* comprehend the benefits of Clojure as an effective Lisp for the JVM
* See how Clojure is used this present day in numerous functional domain names
* detect how Clojure removes the necessity for plenty of verbose and complex layout styles
* installation huge or small net functions to the cloud with Clojure

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Date. Date. com", :exp-date #} The make-user function strictly requires only one argument, a username. The rest of the arguments are assumed to be keyword/value pairs, gathered into a map, and then destructured using the map destructuring form following &. In the map destructuring form, we define a default of “now” for the join-date value. Calling make-user with a single argument returns the user map, populated with defaulted join- and expiration-date values and a nil email value since none was provided in the keyword arguments.

The inner map destructuring—{e :e}— is acting on the value mapped to :d to pull out its value for :e. Date. 73 1 6)}]) ;= #'user/map-in-vector (let [[name {bd :birthday}] map-in-vector] 28. This is due to the polymorphic behavior of get, which looks up values in a collection given a key into that collection; in the case of these indexable sequential values, get uses indices as keys. For more about get, see “Associative” on page 99. Special Forms | 33 (str name " was born on " bd)) ;= "James was born on Thu Feb 06 00:00:00 EST 1973" Map destructuring also has some additional features.

Rational numbers Clojure directly supports rational numbers, also called ratios, as literals in the reader as well as throughout its numeric operators. Rational number literals must always be two integers separated by a slash (/). For a full discussion of rational numbers in Clojure and how they interact with the rest of Clojure’s numerical model, please see “Rationals” on page 424. / regex syntax, with a minor difference of pattern delimiters. string namespace) simpler and more pleasant to use.

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Clojure Programming by Chas Emerick, Brian Carper, Christophe Grand

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