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Julia 1.0 Programming Complete Reference Guide

You're reading from   Julia 1.0 Programming Complete Reference Guide Discover Julia, a high-performance language for technical computing

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Product type Course
Published in May 2019
Publisher
ISBN-13 9781838822248
Length 466 pages
Edition 1st Edition
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Author (1):
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Ivo Balbaert Ivo Balbaert
Author Profile Icon Ivo Balbaert
Ivo Balbaert
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Table of Contents (18) Chapters Close

Preface 1. Installing the Julia Platform FREE CHAPTER 2. Variables, Types, and Operations 3. Functions 4. Control Flow 5. Collection Types 6. More on Types, Methods, and Modules 7. Metaprogramming in Julia 8. I/O, Networking, and Parallel Computing 9. Running External Programs 10. The Standard Library and Packages 11. Creating Our First Julia App 12. Setting Up the Wiki Game 13. Building the Wiki Game Web Crawler 14. Adding a Web UI for the Wiki Game 15. Implementing Recommender Systems with Julia 16. Machine Learning for Recommender Systems 17. Other Books You May Enjoy

Dictionaries

The dictionary, called Dict, is one of Julia's most powerful and versatile data structures. It's an associative collection—it associates keys with values. You can think of a Dict as a look-up table implementation—given a single piece of information, the key, it will return the corresponding value.

Constructing dictionaries

Creating an empty instance of a Dict is as simple as the following:

julia> d = Dict() 
Dict{Any,Any} with 0 entries 

The information between the curly brackets, {Any,Any}, represents the types of keys and values of the Dict. Thus, the concrete type of a Dict itself is defined by the type of its keys and values. The compiler will do its best to infer the type of...

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