Rust: Error Handling – Learning Rust V

Hi Guys,

This is the fifth post I wrote about Learning Rust on Medium, https://medium.com/learning-rust. Now you can read the same content via https://learning-rust.github.io as well. In this post, I tried to summarize about,

  - Smart Compiler
    - Why Compiler?
    - Explain Error Codes

  - Panicking
    - panic!()
    - unimplemented!()
    - unreachable!()
    - assert!(), assert_eq!(), assert_ne!()
    - debug_assert!(), debug_assert_eq!(), debug_assert_ne!()

  - Option and Result
    - Why Option and Result?
    - Basic usages of Option
    - Basic usages of Result
    - is_some(), is_none(), is_ok(), is_err()
    - ok(), err() for Result types

  - Unwrap and Expect
    - unwrap()
    - expect()
    - unwrap_err() and expect_err() for Result types
    - unwrap_or(), unwrap_or_default() and unwrap_or_else()

  - Error and None Propagation
    - ? Operator
    - try!()
    - Error propagation from main()

  - Combinators
    - What is a combinator?
    - or() and and()
    - or_else()
    - and_then()
    - filter()
    - map() and map_err()
    - map_or() and map_or_else()
    - ok_or() and ok_or_else()
    - as_ref() and as_mut()

  - Custom Error Types
    - Error trait
    - From trait

> I am a Sri Lankan🇱🇰 Web Developer who works in Vietnam🇻🇳. I am not a native English speaker and I am just practicing Rust in my very little leisure time, while learning more about Golang, Devops and so much in the workplace. So, if you found any mistake or something I need to be changed, even a spelling or a grammar mistake, please let me know.

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Thanks