Setup Rustlings

Rustlings variables1: Running the rustlings CLI and completing exercises

Rustlings variables2: Declaring types and assigning values to variables

Rustlings variables3: Using the mut keyword to declare a mutable variable

Rustlings variables4: Initializing a variable with a value

Rustlings variables5: Using block scopes to shadow previously declared variables

Rustlings if1: Using an if/else statement to implicitly (or explicitly) return a value

Rustlings functions1: Declaring your first function

Rustlings functions2: Adding a type to function arguments

Rustlings functions3: Passing an argument to a function

Rustlings functions4: Declaring the return type of a function

Rustlings functions5: Implicitly returning values from functions

Rustlings test1: Writing a function that passes a set of tests by reading error messages

Rustlings primitive_types1: Introducing boolean values

Rustlings primitive_types2: String and Character literals using different quote styles

Rustlings primitive_types3: Create an array of numbers using Ranges

Rustlings primitive_types4: Referencing contiguous slices of data we don't own using range

Rustlings Primitive_types5: Destructuring values from a tuple

Rustlings primitive_types6: Accessing specific values in a tuple by index

Rustlings structs1: Instantiating Classic, Tuple, and Unit structs

Rustlings structs2: Filling in the unspecified fields in structs with update syntax

Rustlings strings1: String literals are string slices, not String structs

Rustlings strings2: String structs can be turned into &str slices via referencing

Rustlings test2: Determining when a value is a String struct vs a string slice

Rustlings enums1: Declaring enums

Rustlings enums2: Defining enum variants using classic, unit, and tuple structs

Rustlings enums3: Working with enums by pattern matching variants

Rustlings tests1: Introducing the assert! macro

Rustlings tests2: Introducing the assert_eq! macro

Rustlings tests3: Writing tests for a function

Rustlings test3: Testing a function multiple times

Rustlings modules1: Declaring public functions in a module using the pub keyword

Rustlings modules2: Defining public interfaces for nested modules

Rustlings macros1: Writing your first macro

Rustlings macros2: What order you write macro definitions in matters

Rustlings macros3: Exporting a macro from a module

Rustlings macros4: Using rustfmt to fix common syntax issues

Rustlings test4: Defining macros that accept arguments

Rustlings move_semantics1: Borrowing vectors as mutable

Rustlings move_semantics2: Fixing the borrow of moved values with cloning or references

Rustlings move_semantics3: Specifying that a function argument is mutable

Rustlings move_semantics4: Initializing a vector with the vec! macro

Rustlings errors1: Propagating the reason something failed using Result, Err, and Ok

Rustlings errors2: Handling errors by unwrapping or early-returning with the `?` operator

Rustlings errors3: Using the `?` operator in the main function

Rustlings errorsn: Using Box to dynamically return one of multiple error types at runtime

Rustlings option1: Introducing the Option type

Rustlings option2: Using if let and while let to process Optional values

Rustlings result1: Using custom enum variants as errors in Result return types

Rustlings clippy1: Using Clippy linting to discover potentially dangerous code scenarios

Rustlings clippy2: Making code more readable with clippy linter suggestions

Rustlings arc1: Using Arc to share data safely among threads

Rustlings iterators2: Introducing Iterators by manually calling .next and using .iter()

Rustlings iterators3: Iterating and collecting values using the IntoIter trait

Rustlings iterators4: Implementing Factorial with Iterators

Rustlings traits1: Extending a type with additional functionality by implementing traits

Rustlings traits2: Implementing a Trait for a Vector of Strings

Rustlings generics1: Using Vectors, a struct that implements generics

Rustlings generics2: Converting concrete types to generic implementations

Rustlings generics3: Constraining generics using traits

Learning Rust by Working Through the Rustlings Exercises

[README](https://github.com/ChristopherBiscardi/rustlings/blob/egghead/exercises/error_handling/README.md) for this exercise.

https://doc.rust-lang.org/edition-guide/rust-2018/error-handling-and-panics/the-question-mark-operator-for-easier-error-handling.html

rust

https://app.egghead.io/api/v1/lessons/rust-rustlings-errors2-handling-errors-by-unwrapping-or-early-returning-with-the-operator/transcript

Learning Rust by Working Through the Rustlings Exercises

Rustlings errors2: Handling errors by unwrapping or early-returning with the `?` operator

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