How Rust turn Vec<Vec<char>> to Vec<String>?

Question

For a example:

let record: Vec<Vec<char>> = vec![vec!['.'; 10]; 10];
let example: Vec<String> = record.into_iter().into_iter().collect::<String>().collect::<Vec<String>>();

this doesn't work. how to trans record to example.

Answer 1

You need to iterate and collect each of them to a String :

let example: Vec<String> = record
    .iter()
    .map(|v| v.iter().collect::<String>())
    .collect();

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