"get index of vector" is Vector with GetIndex trait.
Add dependencies get_index_of_vector.
[dependencies]
get_index_of_vector = "1.0.0"
Return type of Vector<T>.get_index(&self, &char) is IndexResult used Result Pattern. So pattern match is available.
// import crete.
extern crete get_index_of_vector;
use get_index_of_vector::IndexResult;
use get_index_of_vector::GetIndex;
...
let characters = vec!['A', 'B', 'C', 'D', 'E'];
let character = 'C';
match characters.get_index(&character) {
IndexResult::Exist(index) => println!("index: {}, character: {}", index, characters[index]),
IndexResult::None => println!("Character is not exist.")
}
// ndex: 2, character: C$ cd src
$ cargo build
$ cargo run
$ brew install rust
$ rustc -V
rustc 1.17.0
$ cargo -V
cargo 0.18.0-dev (fe7b0cd 2017-04-24)
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent