Added a different way of vector intialization. #1787
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Specifying ```Vec::<String>::new()``` explicitly indicates that variable is intended to be a vector containing String elements. This can be helpful for documenting the code and ensuring that variable is used correctly throughout the codebase.
| @@ -20,6 +20,9 @@ fn main() { | |||
| // Canonical macro to initialize a vector with elements. | |||
| let mut v3 = vec![0, 0, 1, 2, 3, 4]; | |||
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| // specifying the type when initializing a vector. | |||
| let mut v4 = Vec::<String>::new(); | |||
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A more idiomatic way to do this would be
let mut v4: Vec<String> = Vec::new();which was covered in the type-inference slide on day 1.
The turbofish operator (::<String>) is introduced in the speaker notes in the impl trait slide in the "Generics" segment and further refined in the sections on FromIterator. I think that's enough coverage for the moment.
There was a problem hiding this comment.
A more idiomatic way to do this would be
let mut v4: Vec<String> = Vec::new();which was covered in the type-inference slide on day 1.
The turbofish operator (
::<String>) is introduced in the speaker notes in the impl trait slide in the "Generics" segment and further refined in the sections on FromIterator. I think that's enough coverage for the moment.
Oh! That's my bad i haven't noticed it. Then lets just close the PR.
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@mani-chand what do you think about doing some work on #1464? A PR fixing the sizes of the slides in a single segment would be a good place to start. This is something really valuable to students, as they can see the course content on the screen without scrolling. I noticed yesterday while making some other changes that the "Control Flow Basics" segment has some very long slides. If you're interested, make a comment in that issue and I'll assign it. |
Sure @djmitche , I am interested in working on it. |
I am taking example datatype as String you can intialize with any datatype that is supported by rust.
Specifying
Vec::<String>::new()explicitly indicates that variable is intended to be a vector containing String elements. This can be helpful for documenting the code and ensuring that variable is used correctly throughout the codebase.