Trait Transform

pub trait Transform {
    // Required methods
    fn name(&self) -> String;
    fn add_row(&mut self, headers: &Headers, row: &Row) -> Result<(), Error>;
    fn value(&self) -> String;

    // Provided method
    fn hash(
        &self,
        _hasher: &mut DefaultHasher,
        _headers: &Headers,
        _row: &Row,
    ) -> Result<(), Error> { ... }
}

For grouping and reducing rows.

Required Methods

fn name(&self) -> String

Get the resulting column name

fn add_row(&mut self, headers: &Headers, row: &Row) -> Result<(), Error>

Combine the row with the value

fn value(&self) -> String

Turn the current value to a string

Provided Methods

fn hash( &self, _hasher: &mut DefaultHasher, _headers: &Headers, _row: &Row, ) -> Result<(), Error>

Add the row to the hasher to group this row separately from others

Implementors