s3 bucket filtering in different ways

main.rs

fn process(buckets: Vec<Bucket>) {
    buckets.iter().filter(|b| b.name == Some(EXACT_NAME.to_string())).for_each(|b| println!("{:#?}", b));

    buckets
        .iter()
        .filter(|b| {
            let matched = b.name.as_ref().unwrap().contains(KEYWORD);
            b.name.is_some() && matched
        })
        .for_each(|b| println!("{:#?}", b));

    buckets
        .iter()
        .filter(|b|
            if let Some(name) = &b.name {
                name.contains(KEYWORD)
            } else {
                false
            }
        )
        .for_each(|b| println!("{:#?}", b));

    buckets
        .iter()
        .filter(|b|
            match &b.name {
                Some(name) => { name.contains(KEYWORD) }
                None => { false }
            }
        )
        .for_each(|b| println!("{:#?}", b));

    buckets
        .iter()
        .filter(|b| {
            let name_op = b.name.as_ref();
            let blank = "".to_string();
            let name = name_op.unwrap_or(&blank);
            name.contains(KEYWORD)
        })
        .for_each(|b| println!("{:#?}", b));

    buckets
        .iter()
        .filter(|b| {
            let blank = String::new();
            let name = &b.name.as_ref().unwrap_or_else(|| &blank);
            name.contains(KEYWORD)
        })
        .for_each(|b| println!("{:#?}", b));
}