polars_lazy::dsl

Function fold_exprs

pub fn fold_exprs<F, E>(acc: Expr, f: F, exprs: E) -> Expr
where F: 'static + Fn(Column, Column) -> Result<Option<Column>, PolarsError> + Send + Sync, E: AsRef<[Expr]>,
Expand description

Accumulate over multiple columns horizontally / row wise.