Struct polars_lazy::dsl::Then

pub struct Then { /* private fields */ }

Utility struct for the when-then-otherwise expression.

Represents the state of the expression after when(...).then(...) is called.

Implementations

impl Then

pub fn when<E>(self, condition: E) -> ChainedWhen

where E: Into<Expr>,

Attach a statement to the corresponding condition.

pub fn otherwise<E>(self, statement: E) -> Expr

where E: Into<Expr>,

Define a default for the when-then-otherwise expression.

Trait Implementations

impl Clone for Then

fn clone(&self) -> Then

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.