Learning Rust via Advent of Code

Re:Learning Rust via Advent of Code by gridspy on Monday February 04, 2019 @04:51PM (#19080984)

Vec<char> or an array for instance - [char; 20] can (automatically) create a "slice" of type &[char]. This is true for all types (not just char).

The operator for this is for eg l[1..10]. It can also happen automatically.

&str is the same type as &[char] - just a renaming.

Still learning Rust myself, apologies if this leads you astray. Just do some reading on slices.

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Re:Learning Rust via Advent of Code by steveklabnik on Monday February 04, 2019 @05:30PM (#19081298)

&str is not the same as &[char]. &str has the same memory representation as &[u8]. char is four bytes, not one.

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Re:Learning Rust via Advent of Code by gridspy on Tuesday February 05, 2019 @02:52AM (#19083646)

Thanks Steve.

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Re:Learning Rust via Advent of Code by steveklabnik on Tuesday February 05, 2019 @03:14AM (#19083707)

No problem! It's an easy mistake to make.

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