feat(transducers): add peek() helper fn

thi-ng · Aug 2, 2018 · e50fd10 · e50fd10
1 parent ff91987
commit e50fd10
Show file tree

Hide file tree

Showing 2 changed files with 9 additions and 0 deletions.
diff --git a/packages/transducers/src/func/peek.ts b/packages/transducers/src/func/peek.ts
@@ -0,0 +1,8 @@
+/**
+ * Returns last element of given array.
+ *
+ * @param x
+ */
+export function peek<T>(x: ArrayLike<T>) {
+    return x[x.length - 1];
+}
diff --git a/packages/transducers/src/index.ts b/packages/transducers/src/index.ts
@@ -109,6 +109,7 @@ export * from "./func/juxtr";
 export * from "./func/key-selector";
 export * from "./func/lookup";
 export * from "./func/odd";
+export * from "./func/peek";
 export * from "./func/renamer";
 export * from "./func/swizzler";
 export * from "./func/weighted-random";