Standardise to commands (#5800)

* standarize to commands

* move from to to into

crates/nu-command/src/dataframe/eager/append.rs

@@ -30,7 +30,7 @@ impl Command for AppendDF {
         vec![
             Example {
                 description: "Appends a dataframe as new columns",
-                example: r#"let a = ([[a b]; [1 2] [3 4]] | to-df);
+                example: r#"let a = ([[a b]; [1 2] [3 4]] | into df);
     $a | append $a"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
@@ -57,7 +57,7 @@ impl Command for AppendDF {
             },
             Example {
                 description: "Appends a dataframe merging at the end of columns",
-                example: r#"let a = ([[a b]; [1 2] [3 4]] | to-df);
+                example: r#"let a = ([[a b]; [1 2] [3 4]] | into df);
     $a | append $a --col"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![

crates/nu-command/src/dataframe/eager/describe.rs

@@ -40,7 +40,7 @@ impl Command for DescribeDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "dataframe description",
-            example: "[[a b]; [1 1] [1 1]] | to-df | describe",
+            example: "[[a b]; [1 1] [1 1]] | into df | describe",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new(

crates/nu-command/src/dataframe/eager/drop.rs

@@ -29,7 +29,7 @@ impl Command for DropDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "drop column a",
-            example: "[[a b]; [1 2] [3 4]] | to-df | drop a",
+            example: "[[a b]; [1 2] [3 4]] | into df | drop a",
             result: Some(
                 NuDataFrame::try_from_columns(vec![Column::new(
                     "b".to_string(),

crates/nu-command/src/dataframe/eager/drop_duplicates.rs

@@ -40,7 +40,7 @@ impl Command for DropDuplicates {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "drop duplicates",
-            example: "[[a b]; [1 2] [3 4] [1 2]] | to-df | drop-duplicates",
+            example: "[[a b]; [1 2] [3 4] [1 2]] | into df | drop-duplicates",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new(

crates/nu-command/src/dataframe/eager/drop_nulls.rs

@@ -34,7 +34,7 @@ impl Command for DropNulls {
         vec![
             Example {
                 description: "drop null values in dataframe",
-                example: r#"let df = ([[a b]; [1 2] [3 0] [1 2]] | to-df);
+                example: r#"let df = ([[a b]; [1 2] [3 0] [1 2]] | into df);
     let res = ($df.b / $df.b);
     let a = ($df | with-column $res --name res);
     $a | drop-nulls"#,
@@ -59,7 +59,7 @@ impl Command for DropNulls {
             },
             Example {
                 description: "drop null values in dataframe",
-                example: r#"let s = ([1 2 0 0 3 4] | to-df);
+                example: r#"let s = ([1 2 0 0 3 4] | into df);
     ($s / $s) | drop-nulls"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![Column::new(

crates/nu-command/src/dataframe/eager/dtypes.rs

@@ -24,7 +24,7 @@ impl Command for DataTypes {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Dataframe dtypes",
-            example: "[[a b]; [1 2] [3 4]] | to-df | dtypes",
+            example: "[[a b]; [1 2] [3 4]] | into df | dtypes",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new(

crates/nu-command/src/dataframe/eager/dummies.rs

@@ -11,7 +11,7 @@ pub struct Dummies;
 
 impl Command for Dummies {
     fn name(&self) -> &str {
-        "to-dummies"
+        "dummies"
     }
 
     fn usage(&self) -> &str {
@@ -26,7 +26,7 @@ impl Command for Dummies {
         vec![
             Example {
                 description: "Create new dataframe with dummy variables from a dataframe",
-                example: "[[a b]; [1 2] [3 4]] | to-df | to-dummies",
+                example: "[[a b]; [1 2] [3 4]] | into df | dummies",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(
@@ -52,7 +52,7 @@ impl Command for Dummies {
             },
             Example {
                 description: "Create new dataframe with dummy variables from a series",
-                example: "[1 2 2 3 3] | to-df | to-dummies",
+                example: "[1 2 2 3 3] | into df | dummies",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(

crates/nu-command/src/dataframe/eager/filter_with.rs

@@ -36,8 +36,8 @@ impl Command for FilterWith {
         vec![
             Example {
                 description: "Filter dataframe using a bool mask",
-                example: r#"let mask = ([true false] | to-df);
-    [[a b]; [1 2] [3 4]] | to-df | filter-with $mask"#,
+                example: r#"let mask = ([true false] | into df);
+    [[a b]; [1 2] [3 4]] | into df | filter-with $mask"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new("a".to_string(), vec![Value::test_int(1)]),
@@ -49,7 +49,7 @@ impl Command for FilterWith {
             },
             Example {
                 description: "Filter dataframe using an expression",
-                example: "[[a b]; [1 2] [3 4]] | to-df | filter-with ((col a) > 1)",
+                example: "[[a b]; [1 2] [3 4]] | into df | filter-with ((col a) > 1)",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new("a".to_string(), vec![Value::test_int(3)]),

crates/nu-command/src/dataframe/eager/first.rs

@@ -27,7 +27,7 @@ impl Command for FirstDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Create new dataframe with head rows",
-            example: "[[a b]; [1 2] [3 4]] | to-df | first 1",
+            example: "[[a b]; [1 2] [3 4]] | into df | first 1",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new("a".to_string(), vec![Value::test_int(1)]),

crates/nu-command/src/dataframe/eager/get.rs

@@ -30,7 +30,7 @@ impl Command for GetDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Returns the selected column",
-            example: "[[a b]; [1 2] [3 4]] | to-df | get a",
+            example: "[[a b]; [1 2] [3 4]] | into df | get a",
             result: Some(
                 NuDataFrame::try_from_columns(vec![Column::new(
                     "a".to_string(),

crates/nu-command/src/dataframe/eager/last.rs

@@ -27,7 +27,7 @@ impl Command for LastDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Create new dataframe with last rows",
-            example: "[[a b]; [1 2] [3 4]] | to-df | last 1",
+            example: "[[a b]; [1 2] [3 4]] | into df | last 1",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new("a".to_string(), vec![Value::test_int(3)]),

crates/nu-command/src/dataframe/eager/list.rs

@@ -25,7 +25,7 @@ impl Command for ListDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Creates a new dataframe and shows it in the dataframe list",
-            example: r#"let test = ([[a b];[1 2] [3 4]] | to-df);
+            example: r#"let test = ([[a b];[1 2] [3 4]] | into df);
     ls-df"#,
             result: None,
         }]

crates/nu-command/src/dataframe/eager/melt.rs

@@ -54,7 +54,8 @@ impl Command for MeltDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "melt dataframe",
-            example: "[[a b c d]; [x 1 4 a] [y 2 5 b] [z 3 6 c]] | to-df | melt -c [b c] -v [a d]",
+            example:
+                "[[a b c d]; [x 1 4 a] [y 2 5 b] [z 3 6 c]] | into df | melt -c [b c] -v [a d]",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new(

crates/nu-command/src/dataframe/eager/rename.rs

@@ -40,7 +40,7 @@ impl Command for RenameDF {
         vec![
             Example {
                 description: "Renames a series",
-                example: "[5 6 7 8] | to-df | rename '0' new_name",
+                example: "[5 6 7 8] | into df | rename '0' new_name",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![Column::new(
                         "new_name".to_string(),
@@ -57,7 +57,7 @@ impl Command for RenameDF {
             },
             Example {
                 description: "Renames a dataframe column",
-                example: "[[a b]; [1 2] [3 4]] | to-df | rename a a_new",
+                example: "[[a b]; [1 2] [3 4]] | into df | rename a a_new",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(
@@ -75,7 +75,7 @@ impl Command for RenameDF {
             },
             Example {
                 description: "Renames two dataframe columns",
-                example: "[[a b]; [1 2] [3 4]] | to-df | rename [a b] [a_new b_new]",
+                example: "[[a b]; [1 2] [3 4]] | into df | rename [a b] [a_new b_new]",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(

crates/nu-command/src/dataframe/eager/sample.rs

@@ -48,12 +48,12 @@ impl Command for SampleDF {
         vec![
             Example {
                 description: "Sample rows from dataframe",
-                example: "[[a b]; [1 2] [3 4]] | to-df | sample -n 1",
+                example: "[[a b]; [1 2] [3 4]] | into df | sample -n 1",
                 result: None, // No expected value because sampling is random
             },
             Example {
                 description: "Shows sample row using fraction and replace",
-                example: "[[a b]; [1 2] [3 4] [5 6]] | to-df | sample -f 0.5 -e",
+                example: "[[a b]; [1 2] [3 4] [5 6]] | into df | sample -f 0.5 -e",
                 result: None, // No expected value because sampling is random
             },
         ]

crates/nu-command/src/dataframe/eager/shape.rs

@@ -27,7 +27,7 @@ impl Command for ShapeDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Shows row and column shape",
-            example: "[[a b]; [1 2] [3 4]] | to-df | shape",
+            example: "[[a b]; [1 2] [3 4]] | into df | shape",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new("rows".to_string(), vec![Value::test_int(2)]),

crates/nu-command/src/dataframe/eager/slice.rs

@@ -31,7 +31,7 @@ impl Command for SliceDF {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Create new dataframe from a slice of the rows",
-            example: "[[a b]; [1 2] [3 4]] | to-df | slice 0 1",
+            example: "[[a b]; [1 2] [3 4]] | into df | slice 0 1",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new("a".to_string(), vec![Value::test_int(1)]),

crates/nu-command/src/dataframe/eager/take.rs

@@ -36,8 +36,8 @@ impl Command for TakeDF {
         vec![
             Example {
                 description: "Takes selected rows from dataframe",
-                example: r#"let df = ([[a b]; [4 1] [5 2] [4 3]] | to-df);
-    let indices = ([0 2] | to-df);
+                example: r#"let df = ([[a b]; [4 1] [5 2] [4 3]] | into df);
+    let indices = ([0 2] | into df);
     $df | take $indices"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
@@ -56,8 +56,8 @@ impl Command for TakeDF {
             },
             Example {
                 description: "Takes selected rows from series",
-                example: r#"let series = ([4 1 5 2 4 3] | to-df);
-    let indices = ([0 2] | to-df);
+                example: r#"let series = ([4 1 5 2 4 3] | into df);
+    let indices = ([0 2] | into df);
     $series | take $indices"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![Column::new(

crates/nu-command/src/dataframe/eager/to_csv.rs

@@ -15,7 +15,7 @@ pub struct ToCSV;
 
 impl Command for ToCSV {
     fn name(&self) -> &str {
-        "to-csv"
+        "to csv"
     }
 
     fn usage(&self) -> &str {
@@ -39,12 +39,12 @@ impl Command for ToCSV {
         vec![
             Example {
                 description: "Saves dataframe to csv file",
-                example: "[[a b]; [1 2] [3 4]] | to-df | to-csv test.csv",
+                example: "[[a b]; [1 2] [3 4]] | into df | to csv test.csv",
                 result: None,
             },
             Example {
                 description: "Saves dataframe to csv file using other delimiter",
-                example: "[[a b]; [1 2] [3 4]] | to-df | to-csv test.csv -d '|'",
+                example: "[[a b]; [1 2] [3 4]] | into df | to csv test.csv -d '|'",
                 result: None,
             },
         ]

crates/nu-command/src/dataframe/eager/to_df.rs

@@ -11,7 +11,7 @@ pub struct ToDataFrame;
 
 impl Command for ToDataFrame {
     fn name(&self) -> &str {
-        "to-df"
+        "into df"
     }
 
     fn usage(&self) -> &str {
@@ -26,7 +26,7 @@ impl Command for ToDataFrame {
         vec![
             Example {
                 description: "Takes a dictionary and creates a dataframe",
-                example: "[[a b];[1 2] [3 4]] | to-df",
+                example: "[[a b];[1 2] [3 4]] | into df",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(
@@ -44,7 +44,7 @@ impl Command for ToDataFrame {
             },
             Example {
                 description: "Takes a list of tables and creates a dataframe",
-                example: "[[1 2 a] [3 4 b] [5 6 c]] | to-df",
+                example: "[[1 2 a] [3 4 b] [5 6 c]] | into df",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(
@@ -70,7 +70,7 @@ impl Command for ToDataFrame {
             },
             Example {
                 description: "Takes a list and creates a dataframe",
-                example: "[a b c] | to-df",
+                example: "[a b c] | into df",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![Column::new(
                         "0".to_string(),
@@ -86,7 +86,7 @@ impl Command for ToDataFrame {
             },
             Example {
                 description: "Takes a list of booleans and creates a dataframe",
-                example: "[true true false] | to-df",
+                example: "[true true false] | into df",
                 result: Some(
                     NuDataFrame::try_from_columns(vec![Column::new(
                         "0".to_string(),

crates/nu-command/src/dataframe/eager/to_nu.rs

@@ -2,7 +2,7 @@ use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
 
 use super::super::values::NuDataFrame;
@@ -12,11 +12,11 @@ pub struct ToNu;
 
 impl Command for ToNu {
     fn name(&self) -> &str {
-        "to-nu"
+        "into nu"
     }
 
     fn usage(&self) -> &str {
-        "Converts a section of the dataframe to Nushell Table"
+        "Converts a section of the dataframe into nushell Table"
     }
 
     fn signature(&self) -> Signature {
@@ -32,16 +32,34 @@ impl Command for ToNu {
     }
 
     fn examples(&self) -> Vec<Example> {
+        let cols = vec!["a".into(), "b".into()];
+        let rec_1 = Value::Record {
+            cols: cols.clone(),
+            vals: vec![Value::test_int(1), Value::test_int(2)],
+            span: Span::test_data(),
+        };
+        let rec_2 = Value::Record {
+            cols,
+            vals: vec![Value::test_int(3), Value::test_int(4)],
+            span: Span::test_data(),
+        };
+
         vec![
             Example {
                 description: "Shows head rows from dataframe",
-                example: "[[a b]; [1 2] [3 4]] | to-df | to nu",
-                result: None,
+                example: "[[a b]; [1 2] [3 4]] | into df | into nu",
+                result: Some(Value::List {
+                    vals: vec![rec_1, rec_2.clone()],
+                    span: Span::test_data(),
+                }),
             },
             Example {
                 description: "Shows tail rows from dataframe",
-                example: "[[a b]; [1 2] [3 4] [5 6]] | to-df | to nu -t -n 1",
-                result: None,
+                example: "[[a b]; [1 2] [5 6] [3 4]] | into df | into nu -t -n 1",
+                result: Some(Value::List {
+                    vals: vec![rec_2],
+                    span: Span::test_data(),
+                }),
             },
         ]
     }
@@ -71,7 +89,7 @@ fn command(
     call: &Call,
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
-    let rows: Option<usize> = call.get_flag(engine_state, stack, "n-rows")?;
+    let rows: Option<usize> = call.get_flag(engine_state, stack, "rows")?;
     let tail: bool = call.has_flag("tail");
 
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
@@ -87,6 +105,8 @@ fn command(
         }
     };
 
+    println!("len: {}", values.len());
+
     let value = Value::List {
         vals: values,
         span: call.head,
@@ -94,3 +114,14 @@ fn command(
 
     Ok(PipelineData::Value(value, None))
 }
+
+#[cfg(test)]
+mod test {
+    use super::super::super::test_dataframe::test_dataframe;
+    use super::*;
+
+    #[test]
+    fn test_examples() {
+        test_dataframe(vec![Box::new(ToNu {})])
+    }
+}

crates/nu-command/src/dataframe/eager/to_parquet.rs

@@ -15,7 +15,7 @@ pub struct ToParquet;
 
 impl Command for ToParquet {
     fn name(&self) -> &str {
-        "to-parquet"
+        "to parquet"
     }
 
     fn usage(&self) -> &str {
@@ -31,7 +31,7 @@ impl Command for ToParquet {
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Saves dataframe to parquet file",
-            example: "[[a b]; [1 2] [3 4]] | to-df | to-parquet test.parquet",
+            example: "[[a b]; [1 2] [3 4]] | into df | to parquet test.parquet",
             result: None,
         }]
     }

crates/nu-command/src/dataframe/eager/with_column.rs

@@ -35,8 +35,8 @@ impl Command for WithColumn {
             Example {
                 description: "Adds a series to the dataframe",
                 example: r#"[[a b]; [1 2] [3 4]]
-    | to-df
-    | with-column ([5 6] | to-df) --name c"#,
+    | into df
+    | with-column ([5 6] | into df) --name c"#,
                 result: Some(
                     NuDataFrame::try_from_columns(vec![
                         Column::new(
@@ -59,7 +59,7 @@ impl Command for WithColumn {
             Example {
                 description: "Adds a series to the dataframe",
                 example: r#"[[a b]; [1 2] [3 4]]
-    | to-lazy
+    | into lazy
     | with-column [
         ((col a) * 2 | as "c")
         ((col a) * 3 | as "d")