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got it working by turning it into a vec

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This commit is contained in:
Michael Angerman 2021-10-27 07:19:33 -07:00
parent 5d62f1a9c1
commit 656e86a7ca
1 changed files with 53 additions and 24 deletions
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77
crates/nu-command/src/filters/last.rs
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@ -2,7 +2,7 @@ use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value};
use nu_protocol::{IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape};
use std::convert::TryInto;
#[derive(Clone)]
@ -33,33 +33,62 @@ impl Command for Last {
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let rows: Option<i64> = call.opt(engine_state, stack, 0)?;
let iter_count: i64 = input.into_iter().count() as i64;
let beginning_rows_to_skip = rows_to_skip(iter_count, rows);
dbg!(beginning_rows_to_skip);
let v: Vec<_> = input.into_iter().collect();
let vlen: i64 = v.len() as i64;
let beginning_rows_to_skip = rows_to_skip(vlen, rows);
/*
let end_rows_desired = if let Some(quantity) = rows {
quantity
} else {
1
};
let beginning_rows_to_skip = if end_rows_desired < v.len() {
v.len() - end_rows_desired
} else {
0
};
*/
let iter = v
.into_iter()
.skip(beginning_rows_to_skip.try_into().unwrap());
//let iter = v.into_iter().skip(beginning_rows_to_skip);
/*
let iter_count: i64 = input.into_iter().count() as i64;
let beginning_rows_to_skip = rows_to_skip(iter_count, rows);
dbg!(beginning_rows_to_skip);
*/
// let beginning_rows_to_skip = 3;
match input {
PipelineData::Stream(stream) => {
dbg!("Stream");
Ok(stream
.skip(beginning_rows_to_skip.try_into().unwrap())
.into_pipeline_data())
}
PipelineData::Value(Value::List { vals, .. }) => {
dbg!("Value");
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 }))
}
}
/*
match input {
PipelineData::Stream(stream) => {
dbg!("Stream");
Ok(stream
.skip(beginning_rows_to_skip.try_into().unwrap())
.into_pipeline_data())
}
PipelineData::Value(Value::List { vals, .. }) => {
dbg!("Value");
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 }))
Ok(iter.into_pipeline_data())
// Ok(PipelineData::Value(Value::Nothing { span: call.head }))
}
}