Function select 

pub fn select<T, I>(iterator: I) -> StdQuestionBuilder<T>
where
    T: PartialEq + FromStr + Send + Sync + 'static,
    <T as FromStr>::Err: Send + Sync + Error + 'static,
    I: IntoIterator<Item = T> + 'static,

Test if the value is inside an iterator

Remarks

To prevent infinite loops, make sure iterator is finite.