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Rollup merge of #23039 - steveklabnik:doc_vec_macro, r=alexcrichton

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Manish Goregaokar 2015-03-06 08:58:58 +05:30
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src/doc/trpl/arrays-vectors-and-slices.md
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@ -60,6 +60,12 @@ let v = vec![1, 2, 3]; // v: Vec<i32>
brackets `[]` with `vec!`. Rust allows you to use either in either situation,
this is just convention.)
There's an alternate form of `vec!` for repeating an initial value:
```
let v = vec![0; 10]; // ten zeroes
```
You can get the length of, iterate over, and subscript vectors just like
arrays. In addition, (mutable) vectors can grow automatically: