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last is working also with the hard coded length, need to figure out how to get the length of the input

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This commit is contained in:
Michael Angerman 2021-10-26 11:46:03 -07:00
parent 7e66aca18e
commit 3625324bad
1 changed files with 37 additions and 33 deletions
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70
crates/nu-command/src/filters/last.rs
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@ -2,8 +2,9 @@ use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{PipelineData, ShellError, Signature, SyntaxShape, Value};
//use nu_protocol::{IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value};
use nu_protocol::{IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value};
use std::convert::TryInto;
#[derive(Clone)]
pub struct Last;
@ -34,39 +35,42 @@ impl Command for Last {
) -> Result<PipelineData, ShellError> {
let rows: Option<i64> = call.opt(engine_state, stack, 0)?;
let vlength = length(input)?;
dbg!(vlength);
let end_rows_desired = if let Some(quantity) = rows {
quantity
} else {
1
};
let beginning_rows_to_skip = if end_rows_desired < vlength {
vlength - end_rows_desired
} else {
0
};
dbg!(beginning_rows_to_skip);
// let iter = v.into_iter().skip(beginning_rows_to_skip);
//dbg!(input.clone());
/*
match input {
PipelineData::Stream(stream) => Ok(stream.into_pipeline_data()),
PipelineData::Value(Value::List { vals, .. }) => {
Ok(vals.into_iter().into_pipeline_data())
}
_ => {
dbg!("Fall to the bottom");
Ok(PipelineData::Value(Value::Nothing { span: call.head }))
}
}
let vlength = length(input)?;
dbg!(vlength);
let end_rows_desired = if let Some(quantity) = rows {
quantity
} else {
1
};
let beginning_rows_to_skip = if end_rows_desired < vlength {
vlength - end_rows_desired
} else {
0
};
dbg!(beginning_rows_to_skip);
*/
Ok(PipelineData::Value(Value::Nothing { span: call.head }))
let beginning_rows_to_skip = 2;
match input {
PipelineData::Stream(stream) => Ok(stream
.skip(beginning_rows_to_skip.try_into().unwrap())
.into_pipeline_data()),
PipelineData::Value(Value::List { vals, .. }) => Ok(vals
.into_iter()
.skip(beginning_rows_to_skip.try_into().unwrap())
.into_pipeline_data()),
_ => {
dbg!("Fall to the bottom");
Ok(PipelineData::Value(Value::Nothing { span: call.head }))
}
}
// Ok(PipelineData::Value(Value::Nothing { span: call.head }))
}
}