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/// Returns the minimum value of a collection.
///
///
/// # Arguments
///
/// * `collection` - The collection to find minimum value.
///
///
/// # Returns
///
/// The minimum value of a collection.
///
/// # Examples
///
/// ```
/// use rufl::collection;
///
/// assert_eq!(Some(1), collection::min(&vec![1, 2, 3, 2]));
///
/// let empty: Vec<i32> = vec![];
/// assert_eq!(None, collection::min(&empty));
///
/// ```
pub fn min<C: AsRef<[T]>, T: PartialOrd + Clone>(collection: &C) -> Option<T> {
let vector = collection.as_ref().to_vec();
match vector.len() {
0 => None,
_ => {
let mut min = &vector[0];
for i in 1..vector.len() {
let val = &vector[i];
if *val < *min {
min = val;
}
}
return Some(min.clone());
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_min() {
assert_eq!(Some(1), min(&vec![1, 2, 3, 1]));
let empty: Vec<i32> = vec![];
assert_eq!(None, min(&empty));
}
}