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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

Maps

A map is used to represent a collection of key-value pairs. The keys need to be of a primitive data type. A map is defined using the map keyword. By default, maps are immutable. We can define a mutable map using the mut keyword.

Maps are like dictionary types in other programming languages such as Dictionary in C#, HashMap in Java, and dict in Python. We will explore how to work with maps, including various ways in which to initialize maps. Then, we will look at how to add, update, or delete key-value pairs from the map.

The explicit initialization of a map

The following code presents the syntax to define a map in V:

mut MAP_NAME := map[KEY_TYPE]VALUE_TYPE{}

The preceding syntax shows the explicit initialization of an empty mutable map. Here, MAP_NAME is a variable name for the map that follows a standard variable naming convention. Then, to the right-hand side of :=, we have used the map keyword. KEY_TYPE must be a primitive data type such as string, rune, and...

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