feat(transducers): add labeled() xform

thi-ng · Jan 27, 2018 · 0b3c786 · 0b3c786
1 parent 931b67f
commit 0b3c786
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/packages/transducers/src/xform/labeled.ts b/packages/transducers/src/xform/labeled.ts
@@ -0,0 +1,6 @@
+import { Transducer } from "../api";
+import { map } from "./map";
+
+export function labeled<L, T>(id: L): Transducer<T, [L, T]> {
+    return map((x) => [id, x]);
+}