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Filtering

trs_dataframe::filter

Trait Filtering 

Source 
pub trait Filtering {
    // Required methods
    fn prepare_indicies(
        &self,
        expression: &Expression,
    ) -> Result<Vec<usize>, Error>;
    fn apply_function(
        &self,
        expression: &Expression,
    ) -> Result<Vec<usize>, Error>;
}
Expand description

Trait for data sources that can evaluate filter expressions.

Required Methods§

Source

fn prepare_indicies(&self, expression: &Expression) -> Result<Vec<usize>, Error>

Returns row indices matching expression.

Source

fn apply_function(&self, expression: &Expression) -> Result<Vec<usize>, Error>

Returns row indices for function-based expressions (e.g. .len()).

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§