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1. Exercism Exercism Public

   C

2. Ludum_Dare_50 Ludum_Dare_50 Public

   C++ 4

3. What does ? mean exactly in rust What does ? mean exactly in rust

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   # What does `?` exactly mean in rust language

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   ## Obvious usage

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   When learning rust, we will for sure encounter [`Option`](https://doc.rust-lang.org/std/option/index.html) and [`Result`](https://doc.rust-lang.org/std/result/index.html) types as a one way of error handling in rust. One of the core principle[^1] of them is that. If you can not deal with an error, return `Err` or `None`  to code that called you. And so on, error are sent to higher function until one of them can do something with that, where on top is main function that can either ask a user to try again or end program here and there. As great as it sound it has a problem, it will end up in lot of boilerplate.

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   ```rust

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   fn foo(x: u16) -> Option<u16> {

4. ObsidianNotes ObsidianNotes Public

5. CV CV Public

   This is my CV

   TeX

6. Ludum_Dare_49 Ludum_Dare_49 Public

   My first game jam, and the poor game i will make.

   C++ 2 1