From 28b0defd3224e9d7b6267569cb1e57a3af853fba Mon Sep 17 00:00:00 2001
From: Timofei Larkin <lllamnyp@gmail.com>
Date: Thu, 15 Aug 2024 13:30:45 +0400
Subject: [PATCH] Add a helper set library to facilitate implementation of the
 new health check procedure (#252)

This is the first PR in a series of [stacked
PRs](https://www.stacking.dev/), aimed ultimately at implementing the
features described in #181 and #207. The next PR in the stack can be
found at #259.
---
 pkg/set/set.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 pkg/set/set.go

diff --git a/pkg/set/set.go b/pkg/set/set.go
new file mode 100644
index 0000000..a1b5131
--- /dev/null
+++ b/pkg/set/set.go
@@ -0,0 +1,29 @@
+package set
+
+type Set[E comparable] map[E]struct{}
+
+func New[E comparable](vals ...E) Set[E] {
+	s := Set[E]{}
+	for _, v := range vals {
+		s[v] = struct{}{}
+	}
+	return s
+}
+
+func (s Set[E]) Add(vals ...E) {
+	for _, v := range vals {
+		s[v] = struct{}{}
+	}
+}
+
+func (s Set[E]) Equals(other Set[E]) bool {
+	if len(s) != len(other) {
+		return false
+	}
+	for k := range s {
+		if _, has := other[k]; !has {
+			return false
+		}
+	}
+	return true
+}