Book Image

Julia Programming Projects

By : Adrian Salceanu
Book Image

Julia Programming Projects

By: Adrian Salceanu

Overview of this book

Julia is a new programming language that offers a unique combination of performance and productivity. Its powerful features, friendly syntax, and speed are attracting a growing number of adopters from Python, R, and Matlab, effectively raising the bar for modern general and scientific computing. After six years in the making, Julia has reached version 1.0. Now is the perfect time to learn it, due to its large-scale adoption across a wide range of domains, including fintech, biotech, education, and AI. Beginning with an introduction to the language, Julia Programming Projects goes on to illustrate how to analyze the Iris dataset using DataFrames. You will explore functions and the type system, methods, and multiple dispatch while building a web scraper and a web app. Next, you'll delve into machine learning, where you'll build a books recommender system. You will also see how to apply unsupervised machine learning to perform clustering on the San Francisco business database. After metaprogramming, the final chapters will discuss dates and time, time series analysis, visualization, and forecasting. We'll close with package development, documenting, testing and benchmarking. By the end of the book, you will have gained the practical knowledge to build real-world applications in Julia.
Table of Contents (19 chapters)
Title Page
Copyright and Credits
About Packt

Raw string literals

If you need to define a string that does not perform interpolation or escaping, for example to represent code from another language that might contain$and\ which can interfere with the Julia parser, you can use raw strings. They are constructed withraw"..."and create ordinaryStringobjects that contain the enclosed characters exactly as entered, with no interpolation or escaping:

julia> "This $will error out" 
ERROR: UndefVarError: will not defined

Putting a $ inside the string will cause Julia to perform interpolation and look for a variable called will:

julia> raw"This $will work" 
"This \$will work"

But by using a raw string, the $ symbol will be ignored (or rather, automatically escaped, as you can see in the output).