The Result type is similar to the Option type, but it offers more, as it also describes the possible error. This means we will have two outcomes: one where the desired element is found and the other where we may have found an error with an element. In this recipe, we will use the map method of Result to return a specific error.
- Preface
- Let us Make System Programming Great Again
- Introduction
- Setting up Rust in Linux and macOS
- Setting up Rust in Windows
- Creating your first Rust program
- Defining a variable assignment
- Setting up Boolean and the character types
- Controlling decimal points, number formats, and named arguments
- Performing arithmetic operations
- Defining mutable variables
- Declaring and performing string operations
- Declaring arrays and using slices in Rust
- Declaring vectors in Rust
- Declaring tuples in Rust
- Performing calculations on two numbers
- Advanced Programming with Rust
- Introduction
- Defining an expression
- Defining constants
- Performing variable bindings
- Performing type casting in Rust
- Decision-making with Rust
- Looping operations in Rust
- Defining the enum type
- Defining closures
- Performing pointer operations in Rust
- Defining your first user-defined data type
- Adding functionality to the user-defined data type
- Similar functionality for different data type
- Deep Diving into Cargo
- Creating Crates and Modules
- Deep Dive into Parallelism
- Efficient Error Handling
- Introduction
- Implementing panic
- Implementing Option
- Creating map combinator
- Creating and_then combinator
- Creating map for the Result type
- Implementing aliases
- Handling multiple errors
- Implementing early returns
- Implementing the try! macro
- Defining your own error types
- Implementing the boxing of errors
- Hacking Macros
- Integrating Rust with Other Languages
- Web Development with Rust
- Advanced Web Development in Rust
- Advanced Rust Tools and Libraries
- Introduction
- Setting up rustup
- Setting up rustfmt
- Setting up rust-clippy
- Setting up and testing with Servo
- Generating random numbers
- Writing lines to a file
- Parsing unstructured JSON
- Parsing URL from a string
- Decompressing a tarball
- Compressing a directory to a tarball
- Finding file extensions recursively
Creating map for the Result type
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