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Getting Started with V Programming

Getting Started with V Programming

By : Pavan Kumar Rao
4.4 (16)
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Getting Started with V Programming

Getting Started with V Programming

4.4 (16)
By: Pavan Kumar Rao

Overview of this book

A new language on the block, V comes with a promising set of features such as fast compilation and interoperability with other programming languages. This is the first book on the V programming language, packed with concise information and a walkthrough of all the features you need to know to get started with the language. The book begins by covering the fundamentals to help you learn about the basic features of V and the suite of built-in libraries available within the V ecosystem. You'll become familiar with primitive data types, declaring variables, arrays, and maps. In addition to basic programming, you'll develop a solid understanding of the building blocks of programming, including functions, structs, and modules in the V programming language. As you advance through the chapters, you'll learn how to implement concurrency in V Programming, and finally learn how to write test cases for functions. This book takes you through an end-to-end project that will guide you to build fast and maintainable RESTful microservices by leveraging the power of V and its built-in libraries. By the end of this V programming book, you'll be well-versed with the V programming language and be able to start writing your own programs and applications.
Table of Contents (19 chapters)
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1
Section 1: Introduction to the V Programming Language
4
Section 2: Basics of V Programming
12
Section 3: Advanced Concepts in V Programming

Setting up utility functions and constants for the microservice

In this section, we will add all of the common functions and constants, if any, to the util.v file. Let's say that we want our microservice to provide a custom JSON response that includes a status code and a descriptive message, whenever a request originates, to do the following:

  • Retrieve record(s) that don't exist.
  • Create or update a record with malformed JSON payloads in the request body.
  • Create or update a note with a message that is not unique.
  • Update a record that doesn't exist.

To achieve this, in the util.v file, we will add a struct, named CustomResponse, that has a status field to represent a status code and a message field that provides descriptive details about the state of action being performed by the microservice endpoint, as follows:

// file: util.v
module main
import json
struct CustomResponse {
    status  int
   ...
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