Add select

crates/nu-protocol/src/ast/cell_path.rs

@@ -13,6 +13,24 @@ pub struct CellPath {
     pub members: Vec<PathMember>,
 }
 
+impl CellPath {
+    pub fn into_string(&self) -> String {
+        let mut output = String::new();
+
+        for (idx, elem) in self.members.iter().enumerate() {
+            if idx > 0 {
+                output.push('.');
+            }
+            match elem {
+                PathMember::Int { val, .. } => output.push_str(&format!("{}", val)),
+                PathMember::String { val, .. } => output.push_str(val),
+            }
+        }
+
+        output
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct FullCellPath {
     pub head: Expression,