Rust: code snippets

rust_code_snippets.md

Convert a Vec to Vec<&str>

let v: Vec<&str> = v.iter().map(AsRef::as_ref).collect();

Convert a collection of characters into a String

1. chars.iter().collect::()

// Vec<char> -> String
let chars = vec!['a', 'b', 'c'];
let string = chars.iter().collect::<String>();

// [char] -> String
let chars = ['a', 'b', 'c'];
let string = chars.iter().collect::<String>();
  
// &[char] -> String
let slice_chars = &chars[..];
let string = slice_chars.iter().collect::<String>();

2. chars.concat()

//  Vec<char> -> String  
let chars = vec!["a", "b", "c"];
let string = chars.concat();

3. strings.join(separator)

let names = ["firstName", "lastName"];
let joined = names.join(", ");