Struct clipivot::aggregation::Aggregator

pub struct Aggregator<T, I, O>where
    T: Accumulate<I, O>,
    I: FromStr,
    O: Display,{ /* private fields */ }

The object that computes the aggregations and writes to standard output.

Implementations

impl<T, I, O> Aggregator<T, I, O>where T: Accumulate<I, O>, I: FromStr, O: Display,

pub fn new( index_cols: Vec<usize>, column_cols: Vec<usize>, values_col: usize, skip_null: bool, row_order: OutputOrder, column_order: OutputOrder, parsing_strategy: ParsingStrategy ) -> Aggregator<T, I, O>

pub fn aggregate<R: Read>(&mut self, rdr: &mut Reader<R>) -> CsvCliResult<()>

Takes a CSV (from anything that impl’s Read) and aggregates information from the struct’s settings. Does not write anything.

pub fn to_vec(&self) -> Vec<Vec<String>>

Writes the aggregated information into a list of records

pub fn write_results<W: Write>( &mut self, writer: &mut Writer<W> ) -> CsvCliResult<()>

Writes the aggregated information to standard output.

Trait Implementations

impl<T, I, O> Debug for Aggregator<T, I, O>where T: Accumulate<I, O> + Debug, I: FromStr + Debug, O: Display + Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T, I, O> PartialEq<Aggregator<T, I, O>> for Aggregator<T, I, O>where T: Accumulate<I, O> + PartialEq, I: FromStr + PartialEq, O: Display + PartialEq,

fn eq(&self, other: &Aggregator<T, I, O>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T, I, O> StructuralPartialEq for Aggregator<T, I, O>where T: Accumulate<I, O>, I: FromStr, O: Display,