reject multiple row args support (#10163)

# Description
This PR fixes `reject` failing when providing row items in ascending
order.


# User-Facing Changes
users can now `reject` multiple rows independently of each other.
```nushell
let foo = [[a b]; [ 1 2] [3 4] [ 5 6]]
# this will work independant of the order
print ($foo | reject 2 1)
print ($foo | reject 1 2)
```

---------

Co-authored-by: Antoine Stevan <44101798+amtoine@users.noreply.github.com>

crates/nu-command/src/filters/reject.rs

@@ -1,10 +1,12 @@
 use nu_engine::CallExt;
-use nu_protocol::ast::{Call, CellPath};
+use nu_protocol::ast::{Call, CellPath, PathMember};
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
     Category, Example, IntoPipelineData, PipelineData, Record, ShellError, Signature, Span,
     SyntaxShape, Type, Value,
 };
+use std::cmp::Reverse;
+use std::collections::HashSet;
 
 #[derive(Clone)]
 pub struct Reject;
@@ -70,6 +72,17 @@ impl Command for Reject {
                     Span::test_data(),
                 )),
             },
+            Example {
+                description: "Reject a row in a table",
+                example: "[[a, b]; [1, 2] [3, 4]] | reject 1",
+                result: Some(Value::List {
+                    vals: vec![Value::test_record(Record {
+                        cols: vec!["a".to_string(), "b".to_string()],
+                        vals: vec![Value::test_int(1), Value::test_int(2)],
+                    })],
+                    span: Span::test_data(),
+                }),
+            },
             Example {
                 description: "Reject the specified field in a record",
                 example: "{a: 1, b: 2} | reject a",
@@ -99,15 +112,47 @@ fn reject(
     input: PipelineData,
     cell_paths: Vec<CellPath>,
 ) -> Result<PipelineData, ShellError> {
+    let mut unique_rows: HashSet<usize> = HashSet::new();
     let val = input.into_value(span);
     let mut val = val;
-    let mut columns = vec![];
-    for c in cell_paths {
-        if !columns.contains(&c) {
-            columns.push(c);
-        }
+    let mut new_columns = vec![];
+    let mut new_rows = vec![];
+    for column in cell_paths {
+        let CellPath { ref members } = column;
+        match members.get(0) {
+            Some(PathMember::Int { val, span, .. }) => {
+                if members.len() > 1 {
+                    return Err(ShellError::GenericError(
+                        "Reject only allows row numbers for rows".into(),
+                        "extra after row number".into(),
+                        Some(*span),
+                        None,
+                        Vec::new(),
+                    ));
+                }
+                if !unique_rows.contains(val) {
+                    unique_rows.insert(*val);
+                    new_rows.push(column);
+                }
+            }
+            _ => {
+                if !new_columns.contains(&column) {
+                    new_columns.push(column)
+                }
+            }
+        };
     }
-    for cell_path in columns {
+    new_rows.sort_unstable_by_key(|k| {
+        Reverse({
+            match k.members[0] {
+                PathMember::Int { val, .. } => val,
+                PathMember::String { .. } => usize::MIN,
+            }
+        })
+    });
+
+    new_columns.append(&mut new_rows);
+    for cell_path in new_columns {
         val.remove_data_at_cell_path(&cell_path.members)?;
     }
     Ok(val.into_pipeline_data())

crates/nu-command/tests/commands/reject.rs

@@ -79,6 +79,12 @@ fn ignores_duplicate_columns_rejected() {
     assert_eq!(actual.out, "last name");
 }
 
+#[test]
+fn ignores_duplicate_rows_rejected() {
+    let actual = nu!("[[a,b];[1 2] [3 4] [5 6]] | reject 2 2 | to nuon");
+    assert_eq!(actual.out, "[[a, b]; [1, 2], [3, 4]]");
+}
+
 #[test]
 fn reject_record_from_raw_eval() {
     let actual = nu!(r#"{"a": 3} | reject a | describe"#);
@@ -143,3 +149,15 @@ fn reject_optional_row() {
     let actual = nu!("[{foo: 'bar'}] | reject 3? | to nuon");
     assert_eq!(actual.out, "[[foo]; [bar]]");
 }
+
+#[test]
+fn reject_multiple_rows_ascending() {
+    let actual = nu!("[[a,b];[1 2] [3 4] [5 6]] | reject 1 2 | to nuon");
+    assert_eq!(actual.out, "[[a, b]; [1, 2]]");
+}
+
+#[test]
+fn reject_multiple_rows_descending() {
+    let actual = nu!("[[a,b];[1 2] [3 4] [5 6]] | reject 2 1 | to nuon");
+    assert_eq!(actual.out, "[[a, b]; [1, 2]]");
+}