From adb239300fa1afa4a7d5450b35454a7e0fcd210b Mon Sep 17 00:00:00 2001
From: Olaoluwa Osuntokun <laolu32@gmail.com>
Date: Tue, 6 Dec 2022 18:32:06 -0800
Subject: [PATCH] fn: add new fn (func utils) package for generic helper funcs

We start with a simple Map function that can be useful for transforming
objects on the fly.

We may want to eventually make this Taro pakage into a module so we can
just have everything in one place:
https://github.com/lightninglabs/taro/tree/main/chanutils.
---
 fn/stream.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 fn/stream.go

diff --git a/fn/stream.go b/fn/stream.go
new file mode 100644
index 000000000..9974eb467
--- /dev/null
+++ b/fn/stream.go
@@ -0,0 +1,13 @@
+package fn
+
+// Map takes an input slice, and applies the function f to each element,
+// yielding a new slice.
+func Map[T1, T2 any](s []T1, f func(T1) T2) []T2 {
+	r := make([]T2, len(s))
+
+	for i, v := range s {
+		r[i] = f(v)
+	}
+
+	return r
+}