Merge pull request #281 from jonathandturner/improve_arrays

Add from_array and improve array viewing

README.md

@@ -158,6 +158,7 @@ Nu adheres closely to a set of goals that make up its design philosophy. As feat
 | nth row-number | Return only the selected row |
 | str (field) | Apply string function. Optional use the field of a table |
 | tags | Read the tags (metadata) for values |
+| from-array | Expand an array/list into rows |
 | to-array | Collapse rows into a single list |
 | to-json | Convert table into .json text |
 | to-toml | Convert table into .toml text |

src/cli.rs

@@ -147,6 +147,7 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
         context.add_commands(vec![
             command("first", Box::new(first::first)),
             command("pick", Box::new(pick::pick)),
+            command("from-array", Box::new(from_array::from_array)),
             command("from-ini", Box::new(from_ini::from_ini)),
             command("from-csv", Box::new(from_csv::from_csv)),
             command("from-json", Box::new(from_json::from_json)),
@@ -161,6 +162,7 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
             command("nth", Box::new(nth::nth)),
             command("n", Box::new(next::next)),
             command("p", Box::new(prev::prev)),
+            command("debug", Box::new(debug::debug)),
             command("lines", Box::new(lines::lines)),
             command("pick", Box::new(pick::pick)),
             command("shells", Box::new(shells::shells)),

src/commands.rs

@@ -10,9 +10,11 @@ crate mod command;
 crate mod config;
 crate mod cp;
 crate mod date;
+crate mod debug;
 crate mod enter;
 crate mod exit;
 crate mod first;
+crate mod from_array;
 crate mod from_csv;
 crate mod from_ini;
 crate mod from_json;

src/commands/debug.rs

@@ -0,0 +1,14 @@
+use crate::errors::ShellError;
+use crate::prelude::*;
+
+pub fn debug(args: CommandArgs, _registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
+    let input = args.input;
+
+    Ok(input
+        .values
+        .map(|v| {
+            println!("{:?}", v);
+            ReturnSuccess::value(v)
+        })
+        .to_output_stream())
+}

src/commands/from_array.rs

@@ -0,0 +1,21 @@
+use crate::object::Value;
+use crate::prelude::*;
+
+pub fn from_array(
+    args: CommandArgs,
+    _registry: &CommandRegistry,
+) -> Result<OutputStream, ShellError> {
+    let stream = args
+        .input
+        .values
+        .map(|item| match item {
+            Tagged {
+                item: Value::List(vec),
+                ..
+            } => VecDeque::from(vec),
+            x => VecDeque::from(vec![x]),
+        })
+        .flatten();
+
+    Ok(stream.to_output_stream())
+}

src/format/table.rs

@@ -40,11 +40,17 @@ impl TableView {
         let mut entries = vec![];
 
         for (idx, value) in values.iter().enumerate() {
-            let mut row: Vec<String> = headers
+            let mut row: Vec<String> = match value {
+                Tagged {
+                    item: Value::Object(..),
+                    ..
+                } => headers
                     .iter()
                     .enumerate()
                     .map(|(i, d)| value.get_data(d).borrow().format_leaf(Some(&headers[i])))
-                .collect();
+                    .collect(),
+                x => vec![x.format_leaf(None)],
+            };
 
             if values.len() > 1 {
                 row.insert(0, format!("{}", Color::Black.bold().paint(idx.to_string())));