Struct LoadOptions 

pub struct LoadOptions {
    pub delimiter: Delimiter,
    pub has_header: bool,
    pub skip_rows: usize,
    pub max_rows: Option<usize>,
    pub sheet_index: Option<usize>,
    pub sheet_name: Option<String>,
    pub infer_schema: bool,
    pub infer_schema_length: Option<usize>,
}

Configuration options for loading data files.

This struct uses the builder pattern for a flexible, extensible API.

Examples

use dataload::{LoadOptions, Delimiter};

// Default options
let opts = LoadOptions::default();

// Custom options
let opts = LoadOptions::new()
    .with_delimiter(Delimiter::Tab)
    .with_header(false)
    .with_skip_rows(1);

Fields

delimiter: Delimiter

The delimiter to use for CSV parsing.

has_header: bool

Whether the first row contains headers.

skip_rows: usize

Number of rows to skip from the start.

max_rows: Option<usize>

Maximum number of rows to read (None = all rows).

sheet_index: Option<usize>

For Excel files: which sheet to read (0-indexed). None means read the first sheet.

sheet_name: Option<String>

For Excel files: sheet name to read. Takes precedence over sheet_index if both are set.

infer_schema: bool

Whether to infer data types for columns.

infer_schema_length: Option<usize>

Number of rows to use for schema inference.

Implementations

impl LoadOptions

pub fn new() -> Self

Creates a new LoadOptions with default values.

pub const fn with_delimiter(self, delimiter: Delimiter) -> Self

Sets the delimiter for CSV parsing.

Use Delimiter::Auto (default) for automatic detection.

pub const fn with_header(self, has_header: bool) -> Self

Sets whether the first row contains headers.

Default is true.

pub const fn with_skip_rows(self, skip_rows: usize) -> Self

Sets the number of rows to skip from the start of the file.

This is applied before header detection, so if skip_rows = 1 and has_header = true, the second row becomes the header.

pub const fn with_max_rows(self, max_rows: Option<usize>) -> Self

Sets the maximum number of rows to read.

None means read all rows (default).

pub const fn with_sheet_index(self, index: usize) -> Self

Sets the sheet index to read from Excel files (0-indexed).

pub fn with_sheet_name(self, name: impl Into<String>) -> Self

Sets the sheet name to read from Excel files.

Takes precedence over sheet_index if both are set.

pub const fn with_infer_schema(self, infer: bool) -> Self

Sets whether to infer data types for columns.

Default is true.

pub const fn with_infer_schema_length(self, length: Option<usize>) -> Self

Sets the number of rows to use for schema inference.

None means use all rows. Default is Some(1000).

Trait Implementations

impl Clone for LoadOptions

fn clone(&self) -> LoadOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LoadOptions

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

Formats the value using the given formatter.

impl Default for LoadOptions

fn default() -> Self

Returns the “default value” for a type.