Learning the Basics

In this chapter, we will cover the following recipes:

• Concatenating strings
• Using the format! macro
• Providing a default implementation
• Using the constructor pattern
• Using the builder pattern
• Parallelism through simple threads
• Generating random numbers
• Querying with regexes
• Accessing the command line
• Interacting with environment variables
• Reading from stdin
• Accepting a variable number of arguments