Book Image

.Go Programming Blueprints - Second Edition

By : Mat Ryer
Book Image

.Go Programming Blueprints - Second Edition

By: Mat Ryer

Overview of this book

Go is the language of the Internet age, and the latest version of Go comes with major architectural changes. Implementation of the language, runtime, and libraries has changed significantly. The compiler and runtime are now written entirely in Go. The garbage collector is now concurrent and provides dramatically lower pause times by running in parallel with other Go routines when possible. This book will show you how to leverage all the latest features and much more. This book shows you how to build powerful systems and drops you into real-world situations. You will learn to develop high quality command-line tools that utilize the powerful shell capabilities and perform well using Go's in-built concurrency mechanisms. Scale, performance, and high availability lie at the heart of our projects, and the lessons learned throughout this book will arm you with everything you need to build world-class solutions. You will get a feel for app deployment using Docker and Google App Engine. Each project could form the basis of a start-up, which means they are directly applicable to modern software markets.
Table of Contents (13 chapters)

Representing data in code


We are first going to expose the journeys that users can select from; so, create a new folder called meander in GOPATH and add the following journeys.go code:

package meander 
type j struct { 
  Name       string 
  PlaceTypes []string 
} 
var Journeys = []interface{}{ 
  j{Name: "Romantic", PlaceTypes: []string{"park", "bar",  
   "movie_theater", "restaurant", "florist", "taxi_stand"}}, 
  j{Name: "Shopping", PlaceTypes: []string{"department_store",  "cafe", 
   "clothing_store", "jewelry_store", "shoe_store"}}, 
  j{Name: "Night Out", PlaceTypes: []string{"bar", "casino", "food", 
   "bar", "night_club", "bar", "bar", "hospital"}}, 
  j{Name: "Culture", PlaceTypes: []string{"museum", "cafe", "cemetery", 
   "library", "art_gallery"}}, 
  j{Name: "Pamper", PlaceTypes: []string{"hair_care",  "beauty_salon", 
   "cafe", "spa"}}, 
} 

Here, we define an internal type called j inside the meander package, which we then use to describe the journeys by creating instances...