auto: 2026-09-20 02:30 (ESD_LAPTOP)

M01_MasterData/M01_MasterData_UI_Cells.ts

@@ -33,6 +33,16 @@ export function withCell(row: Row, path: string, value: unknown): Row {
   return { ...row, [head]: { ...(row[head] as Row), [sub]: value } };
 }
 
+/** 줄 안 깊은 자리 읽기 · 넣은 새 줄(중간 묶음 없으면 만듦). */
+export const deep = (row: Row, path: string[]): unknown =>
+  path.reduce<unknown>((o, k) => (o as Row | null | undefined)?.[k], row);
+
+export function withDeep(row: Row, path: string[], value: unknown): Row {
+  const [head, ...rest] = path;
+  if (!rest.length) return { ...row, [head]: value };
+  return { ...row, [head]: withDeep((row[head] ?? {}) as Row, rest, value) };
+}
+
 export function show(v: unknown): string {
   if (v === null || v === undefined) return "";
   if (Array.isArray(v)) return v.map((x) => (x === null ? "" : String(x))).join(" ~ ");