snapshot of https://github.com/raimohanska/ourboard.git (master, 2026-09-23; blobs > 131072B omitted)

common/src/sets.ts

@@ -0,0 +1,16 @@
+export function toggleInSet<T>(item: T, set: Set<T>) {
+    if (set.has(item)) {
+        return new Set([...set].filter((i) => i !== item))
+    }
+    return new Set([...set].concat(item))
+}
+
+export function difference<A>(setA: Set<A>, setB: Set<A>) {
+    let _difference = new Set(setA)
+    for (let elem of setB) {
+        _difference.delete(elem)
+    }
+    return _difference
+}
+
+export const emptySet = <A>() => new Set<A>()