Professional Clojure by Jeremy Anderson, Michael Gaare, Justin Holgu?n, Nick Bailey, PDF

By Jeremy Anderson, Michael Gaare, Justin Holgu?n, Nick Bailey, Timothy Pratley

ISBN-10: 1119267277

ISBN-13: 9781119267270

Clear, sensible Clojure for the pro programmer

Professional Clojure is the skilled developer's advisor to useful programming utilizing the Clojure language. Designed particularly to satisfy the wishes builders, this e-book in brief introduces practical programming ahead of skipping on to the center of utilizing Clojure in a real-world surroundings. The dialogue information the read—eval—print workflow that permits quickly suggestions loops, then dives into enterprise-level Clojure improvement with specialist counsel on net providers, checking out, datomics, functionality, and extra. learn from commencing to finish, this ebook serves as a transparent, direct advisor to Clojure programming—but the excellent assurance and element makes it terribly necessary as a short reference for mid-project snags. the writer workforce contains 4 specialist Clojure builders, making sure professional-level guide from a hugely sensible perspective.

Clojure is an open-source programming language maintained and supported through Cognitect., and quick gaining use throughout industries at businesses like Amazon, Walmart, fb, Netflix, and extra. This consultant presents a concise, but thorough source for pro builders wanting to fast placed Clojure to work.

  • Parse the variation among practical and object-oriented programming
  • Understand Clojure functionality and capabilities
  • Develop reactive websites utilizing ClojureScript
  • Adopt an REPL-driven improvement workflow

Clojure is a contemporary dialect of Lisp, designed for concurrency and Java compatibility. it may be used with the Java digital desktop, Microsoft's universal Language Runtime, and JavaScript engines, delivering a degree of either versatility and performance that's beautiful to an increasing number of enterprise-level builders. As standards develop more and more complicated, stepping clear of critical programming can dramatically streamline the advance workflow. Professional Clojure presents the professional guide that will get pros in control and again to paintings quickly.

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New PDF release: Professional Clojure

Transparent, useful Clojure for the pro programmer specialist Clojure is the skilled developer's consultant to sensible programming utilizing the Clojure language. Designed particularly to fulfill the wishes builders, this publication in short introduces useful programming sooner than skipping on to the guts of utilizing Clojure in a real-world environment.

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Com/jkk/honeysql. , and the like. Let’s take a look at one of the examples from their documentation. )" "baz"] Honey SQL even defi nes a helper function called build that helps you defi ne these map objects as shown below. a "baz"], :from [:foo], :select [:*]} Leveraging the build function allows you to still use the same style of specifying the query; however, it doesn’t require all of the extra brackets as before, making it just that much more concise. indd 04/23/2016 Page 28 Summary ❘ 29 Clojure also offers some really nice metaprogramming abilities through defprotocol.

You can rewrite the previous example in Clojure to look like this code: (defn wrapInTransaction [f] (do (startTransaction) (f) (completeTransaction))) (wrapInTransaction #( (do (add order user) (addLineItemsFrom cart orderKey)))) To put it another way, with imperative languages you usually have to be more concerned with how you do things, and in Clojure you’re able to focus more on the what you want to do. You can defi ne abstractions at a different level than what is possible in most imperative languages.

For example, when looking for a value in a map, the value for a key can be nil. To determine whether or not it exists in the map, you have to return a default value. indd 04/23/2016 Page 15 16 ❘ CHAPTER 1 HAVE A BEGINNER’S MIND Unlike Java, nil is everywhere and for functions return nil. Most functions are/should be written to handle a passed in nil value. com/nil-punning) The Functional Web It’s interesting to see how web programming has evolved over the years. Many different paradigms have come and gone, with some better than others, and yet we haven’t seen the end of this evolution.

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Professional Clojure by Jeremy Anderson, Michael Gaare, Justin Holgu?n, Nick Bailey, Timothy Pratley

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