Struct Writer 

pub struct Writer { /* private fields */ }

DataFrame reading struct

Example

use blackjack::prelude::*;

let mut df = DataFrame::new();

df.add_column(Series::arange(0, 10));
df.add_column(Series::arange(0, 10));

let result = Writer::new(&"/tmp/test.csv.gz").delimiter(b',').write(df).is_ok(); // Gzip compression inferred.
assert_eq!(result, true);

Implementations

impl Writer

pub fn new<S: AsRef<OsStr> + ToString>(path: &S) -> Self

Create a new instance of Reader with defaults CSV params

pub fn has_headers(self, yes: bool) -> Self

Whether to write headers in the file or not with the dataframe output.

pub fn quote(self, quote: u8) -> Self

Set the CSV quote character, default is b'"'

pub fn delimiter(self, delimiter: u8) -> Self

Set the CSV delimiter, default is b',' (comma delimited)

pub fn terminator(self, terminator: u8) -> Self

Set the CSV line terminator, default treats any of \r, \n or \r\n as a line terminator

pub fn write<I: PartialEq + PartialOrd + BlackJackData>( &self, df: DataFrame<I>, ) -> Result<(), BlackJackError>

Write a dataframe to CSV, consumes self, and thus will not double memory whilst writing to CSV.

Trait Implementations

impl Clone for Writer

fn clone(&self) -> Writer

Returns a duplicate of the value.

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

Performs copy-assignment from source.