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LeetCode/rs/custom-sort-string.rs

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Rust
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use std::collections::HashMap;
impl Solution {
pub fn custom_sort_string(order: String, s: String) -> String {
let weights: HashMap<char, usize> =
order.chars().enumerate().map(|(i, c)| (c, i)).collect();
let mut s: Vec<char> = s.chars().collect();
s.sort_unstable_by_key(|c| *weights.get(c).unwrap_or(&usize::MAX));
s.into_iter().collect()
}
}