Clojure Cookbook Recipes for Functional Programming by Luke VanderHart

By Luke VanderHart

With greater than one hundred fifty unique recipes, this cookbook indicates skilled Clojure builders the way to resolve a number of programming projects with this JVM language. The suggestions hide every thing from construction dynamic web pages and dealing with databases to community verbal exchange, cloud computing, and complex checking out thoughts. And greater than 60 of the world’s top Clojurians contributed recipes.
Each recipe comprises code so that you can use without delay, besides a dialogue on how and why the answer works, so that you can adapt those styles, methods, and strategies to occasions now not particularly lined during this cookbook.
Master integrated primitive and composite info structures
Create, strengthen and put up libraries, utilizing the Leiningen tool
Interact with the neighborhood laptop that’s operating your application
Manage community conversation protocols and libraries
Use options for connecting to and utilizing numerous databases
Build and retain dynamic web content, utilizing the hoop HTTP server library
Tackle software initiatives corresponding to packaging, dispensing, profiling, and logging
Take on cloud computing and heavyweight allotted info crunching
Dive into unit, integration, simulation, and property-based testing
Clojure Cookbook is a collaborative venture with contributions from the various world’s most sensible Clojurians, whose backgrounds diversity from aerospace to social media, banking to robotics, AI learn to e-commerce.

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234-00:00" doesn’t look very much like Java, does it? Date as its backing implementation. 26, “Representing Dates as Literals”. Using System/currentTimeMillis can be useful for performing a one-off benchmark, but given the high-quality tools out there that do this already, currentTimeMillis is of limited utility; you may want to try Hugo Duncan’s Criterium library if benchmarking is what you’re after. Additionally, you shouldn’t try to use currentTimeMillis as some sort of unique value—UUIDs do a much better job of this.

All together, time-range returns a lazy sequence of DateTime objects that stretches from a start time to an end time, stepped appropriately by the provided step value. Imagine trying to build something similar in a language without first-class laziness. 32. Generating Ranges of Dates and Times Using Native Java Types by Tom Hicks Problem You would like to generate a lazy sequence of dates (or times) beginning with a specific date and time. 31, “Generating Ranges of Dates and Times”, you would like to do this using only built-in types.

As with any powerful new tool, it’s easy to overdo it. Because of their terse and compact syntax, it’s very easy to produce regexes that are both difficult to interpret and at a high risk of being incorrect. You should use regular expressions sparingly and only if you fully understand their syntax. Jeffrey Friedl’s Mastering Regular Expressions, 3rd ed. (O’Reilly) is a fantastic book for learning and mastering regular expression syntax. 10. Splitting a String into Parts by Ryan Neufeld Problem You need to split a string into a number of parts.

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