Maximum Number of Words You Can Type LeetCode solution in Rust

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impl Solution {
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  pub fn can_be_typed_words(text: String, broken_letters: String) -> i32 {
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    let broken_hash = broken_letters
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      .into_bytes()
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      .iter()
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      .fold([false; 26], |mut acc, &b| {
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        acc[(b - b'a') as usize] = true;
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        acc
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      });
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    text
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      .split_ascii_whitespace()
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      .filter(|&s| {
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        s.as_bytes()
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          .iter()
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          .all(|&b| !broken_hash[(b - b'a') as usize])
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      })
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      .count() as _
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  }
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}