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| author | Hunter Kvalevog <hunter@kvog.sh> | 2026-09-14 17:15:13 -0500 |
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| committer | Hunter Kvalevog <hunter@kvog.sh> | 2026-09-14 17:28:26 -0500 |
| commit | bf66df1a16461ef1ee50510803a3097914ffcb82 (patch) | |
| tree | 15a13e34a794ec182c1e4c4507645ac43e07c6bc /rustlings/exercises/12_options/README.md | |
| parent | b6245506460bd854ab32b1b6d2ecc51f5be82ef9 (diff) | |
Add rustlings
Diffstat (limited to 'rustlings/exercises/12_options/README.md')
| -rw-r--r-- | rustlings/exercises/12_options/README.md | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/rustlings/exercises/12_options/README.md b/rustlings/exercises/12_options/README.md new file mode 100644 index 0000000..624572a --- /dev/null +++ b/rustlings/exercises/12_options/README.md @@ -0,0 +1,21 @@ +# Options + +Type Option represents an optional value: every Option is either Some and contains a value, or None, and does not. +Option types are very common in Rust code, as they have a number of uses: + +- Initial values +- Return values for functions that are not defined over their entire input range (partial functions) +- Return value for otherwise reporting simple errors, where None is returned on error +- Optional struct fields +- Struct fields that can be loaned or "taken" +- Optional function arguments +- Nullable pointers +- Swapping things out of difficult situations + +## Further Information + +- [Option Enum Format](https://doc.rust-lang.org/book/ch10-01-syntax.html#in-enum-definitions) +- [Option Module Documentation](https://doc.rust-lang.org/std/option/) +- [Option Enum Documentation](https://doc.rust-lang.org/std/option/enum.Option.html) +- [if let](https://doc.rust-lang.org/rust-by-example/flow_control/if_let.html) +- [while let](https://doc.rust-lang.org/rust-by-example/flow_control/while_let.html) |