1 files changed, 8 insertions, 2 deletions

diff --git a/util/array.ts b/util/array.ts
index 76e2a9e..5b8c512 100644
--- a/util/array.ts
+++ b/util/array.ts
@@ -1,17 +1,23 @@
 declare global {
 	interface Array<T> {
+		/** @summary check if any of the elements of `arr2` are included in `this` */
 		anyOf(arr2: Array<T>): boolean;
+		/** @summary return last element of array without removing it */
 		peek(): T;
+		/** @summary create Set from this array */
+		set(): Set<T>;
 	}
 }
 
-/** @summary check if any of the elements of `arr2` are included in `this` */
 Array.prototype.anyOf = function(arr2) {
 	return !!this.filter(e => arr2.includes(e)).length;
 };
 
-/** @summary return last element of array without removing it */
 Array.prototype.peek = function() {
 	return this[this.length - 1];
 };
 
+Array.prototype.set = function() {
+	return new Set(this);
+}
+