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use std::fmt::Display;
pub enum Regularization {
None,
L1(f32),
L2(f32),
L1L2(f32, f32),
}
impl Regularization {
pub(crate) fn from_str(line: &str) -> Regularization {
if line == "None" {
return Regularization::None;
}
if let Some((t, vs)) = line.split_once(':') {
return match (t, vs) {
("L1", vs) => Regularization::L1(vs.parse::<f32>().unwrap_or_default()),
("L2", vs) => Regularization::L2(vs.parse::<f32>().unwrap_or_default()),
("L1L2", vs) => {
if let Some((v1, v2)) = vs.split_once(',') {
Regularization::L1L2(
v1.parse::<f32>().unwrap_or_default(),
v2.parse::<f32>().unwrap_or_default(),
)
} else {
Regularization::None
}
}
_ => Regularization::None,
};
}
Regularization::None
}
}
impl Display for Regularization {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Regularization::None => write!(f, "None"),
Regularization::L1(v) => write!(f, "L1:{v}"),
Regularization::L2(v) => write!(f, "L2:{v}"),
Regularization::L1L2(v1, v2) => write!(f, "L1L2:{v1},{v2}"),
}
}
}