forked from extern/nushell
105 lines
3.0 KiB
Rust
105 lines
3.0 KiB
Rust
use super::super::super::values::{Column, NuDataFrame};
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use nu_engine::CallExt;
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use nu_protocol::{
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ast::Call,
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engine::{Command, EngineState, Stack},
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Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value,
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};
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use polars::prelude::IntoSeries;
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#[derive(Clone)]
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pub struct IsIn;
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impl Command for IsIn {
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fn name(&self) -> &str {
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"dfr is-in"
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}
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fn usage(&self) -> &str {
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"Checks if elements from a series are contained in right series"
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}
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fn signature(&self) -> Signature {
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Signature::build(self.name())
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.required("other", SyntaxShape::Any, "right series")
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.category(Category::Custom("dataframe".into()))
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Checks if elements from a series are contained in right series",
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example: r#"let other = ([1 3 6] | dfr to-df);
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[5 6 6 6 8 8 8] | dfr to-df | dfr is-in $other"#,
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result: Some(
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NuDataFrame::try_from_columns(vec![Column::new(
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"is_in".to_string(),
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vec![
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Value::test_bool(false),
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Value::test_bool(true),
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Value::test_bool(true),
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Value::test_bool(true),
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Value::test_bool(false),
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Value::test_bool(false),
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Value::test_bool(false),
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],
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)])
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.expect("simple df for test should not fail")
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.into_value(Span::test_data()),
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),
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}]
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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command(engine_state, stack, call, input)
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}
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}
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fn command(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let df = NuDataFrame::try_from_pipeline(input, call.head)?;
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let other_value: Value = call.req(engine_state, stack, 0)?;
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let other_span = other_value.span()?;
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let other_df = NuDataFrame::try_from_value(other_value)?;
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let other = other_df.as_series(other_span)?;
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let mut res = df
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.as_series(call.head)?
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.is_in(&other)
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.map_err(|e| {
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ShellError::SpannedLabeledError(
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"Error finding in other".into(),
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e.to_string(),
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call.head,
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)
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})?
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.into_series();
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res.rename("is_in");
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NuDataFrame::try_from_series(vec![res.into_series()], call.head)
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.map(|df| PipelineData::Value(NuDataFrame::into_value(df, call.head), None))
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}
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#[cfg(test)]
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mod test {
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use super::super::super::super::test_dataframe::test_dataframe;
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use super::*;
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#[test]
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fn test_examples() {
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test_dataframe(vec![Box::new(IsIn {})])
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}
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}
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