doc + Mask

src/ArrayExtensions.ts

@@ -1,5 +1,6 @@
 import { type UserAPI } from "./API";
 import { SCALES } from "./Scales";
+import { safeScale } from "zifferjs";
 export { };
 
 declare global {
@@ -21,6 +22,8 @@ declare global {
     pick(): T;
     loop(index: number): T;
     shuffle(): this;
+    scale(name: string, base_note?: number): this;
+    arp(scaleName: string): this;
     rotate(steps: number): this;
     unique(): this;
     in(value: T): boolean;
@@ -355,6 +358,7 @@ Array.prototype.scale = function <T>(this: T[], scaleName: string = "major", mas
     let mask = maskLength;
 
   //input protect from unknow scale
+
   if (!scale) {
     throw new Error(`Unknown scale ${scaleName}`);
   }