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  • Book Overview & Buying The Clojure Workshop
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The Clojure Workshop

The Clojure Workshop

By : Joseph Fahey , Thomas Haratyk , Scott McCaughie , Yehonathan Sharvit , Konrad Szydlo
4.3 (13)
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The Clojure Workshop

The Clojure Workshop

4.3 (13)
By: Joseph Fahey , Thomas Haratyk , Scott McCaughie , Yehonathan Sharvit , Konrad Szydlo

Overview of this book

The Clojure Workshop is a step-by-step guide to Clojure and ClojureScript, designed to quickly get you up and running as a confident, knowledgeable developer. Because of the functional nature of the language, Clojure programming is quite different to what many developers will have experienced. As hosted languages, Clojure and ClojureScript can also be daunting for newcomers because of complexities in the tooling and the challenge of interacting with the host platforms. To help you overcome these barriers, this book adopts a practical approach. Every chapter is centered around building something. As you progress through the book, you will progressively develop the 'muscle memory' that will make you a productive Clojure programmer, and help you see the world through the concepts of functional programming. You will also gain familiarity with common idioms and patterns, as well as exposure to some of the most widely used libraries. Unlike many Clojure books, this Workshop will include significant coverage of both Clojure and ClojureScript. This makes it useful no matter your goal or preferred platform, and provides a fresh perspective on the hosted nature of the language. By the end of this book, you'll have the knowledge, skills and confidence to creatively tackle your own ambitious projects with Clojure and ClojureScript.
Table of Contents (17 chapters)
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2
2. Data Types and Immutability

3. Functions in Depth

Activity 3.01: Building a Distance and Cost Calculator

Solution:

  1. Start by defining the walking-speed and driving-speed constants:
     (def walking-speed 4)
    (def driving-speed 70)
  2. Create two other constants representing two locations with the coordinates :lat and :lon. You can use the previous example with Paris and Bordeaux or look up your own. You will be using them to test your distance and itinerary functions:
     (def paris {:lat 48.856483 :lon 2.352413})
    (def bordeaux {:lat 44.834999  :lon -0.575490})
  3. Create the distance function. It should take two parameters representing the two locations for which we need to calculate the distance. You can use a combination of sequential and associative destructuring right in the function parameters to disassemble the latitude and longitude from both locations. You can decompose the steps of the calculation in a let expression and use the Math/cos function to calculate the cosine and Math/sqrt to calculate...
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The Clojure Workshop
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