feat(table): Implement FromIterator for widgets::Row (#755)

The `Row::new` constructor accepts a single argument that implements
`IntoIterator`.  This commit adds an implementation of `FromIterator`,
as a thin wrapper around `Row::new`.  This allows `.collect::<Row>()`
to be used at the end of an iterator chain, rather than wrapping the
entire iterator chain in `Row::new`.

examples/table.rs

@@ -118,17 +118,17 @@ fn ui(f: &mut Frame, app: &mut App) {
 
     let selected_style = Style::default().add_modifier(Modifier::REVERSED);
     let normal_style = Style::default().bg(Color::Blue);
-    let header_cells = ["Header1", "Header2", "Header3"]
+    let header = ["Header1", "Header2", "Header3"]
         .iter()
-        .map(|h| Cell::from(*h).style(Style::default().fg(Color::Red)));
-    let header = Row::new(header_cells)
+        .map(|h| Cell::from(*h).style(Style::default().fg(Color::Red)))
+        .collect::<Row>()
         .style(normal_style)
         .height(1)
         .bottom_margin(1);
-    let footer_cells = ["Footer1", "Footer2", "Footer3"]
+    let footer = ["Footer1", "Footer2", "Footer3"]
         .iter()
-        .map(|f| Cell::from(*f).style(Style::default().fg(Color::Yellow)));
-    let footer = Row::new(footer_cells)
+        .map(|f| Cell::from(*f).style(Style::default().fg(Color::Yellow)))
+        .collect::<Row>()
         .style(normal_style)
         .height(1)
         .top_margin(1);
@@ -139,8 +139,11 @@ fn ui(f: &mut Frame, app: &mut App) {
             .max()
             .unwrap_or(0)
             + 1;
-        let cells = item.iter().map(|c| Cell::from(*c));
-        Row::new(cells).height(height as u16).bottom_margin(1)
+        item.iter()
+            .cloned()
+            .collect::<Row>()
+            .height(height as u16)
+            .bottom_margin(1)
     });
     let t = Table::new(
         rows,

src/widgets/table/row.rs

@@ -45,6 +45,14 @@ use crate::prelude::*;
 /// ]);
 /// ```
 ///
+/// An iterator whose item type is convertible into [`Text`] can be collected into a row.
+///
+/// ```rust
+/// use ratatui::widgets::Row;
+///
+/// (0..10).map(|i| format!("{i}")).collect::<Row>();
+/// ```
+///
 /// `Row` implements [`Styled`] which means you can use style shorthands from the [`Stylize`] trait
 /// to set the style of the row concisely.
 ///
@@ -235,6 +243,15 @@ impl<'a> Styled for Row<'a> {
     }
 }
 
+impl<'a, Item> FromIterator<Item> for Row<'a>
+where
+    Item: Into<Cell<'a>>,
+{
+    fn from_iter<IterCells: IntoIterator<Item = Item>>(cells: IterCells) -> Self {
+        Row::new(cells)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use std::vec;
@@ -249,6 +266,13 @@ mod tests {
         assert_eq!(row.cells, cells);
     }
 
+    #[test]
+    fn collect() {
+        let cells = vec![Cell::from("")];
+        let row: Row = cells.iter().cloned().collect();
+        assert_eq!(row.cells, cells);
+    }
+
     #[test]
     fn cells() {
         let cells = vec![Cell::from("")];