Clean up speed options logic

src/js/utils/arrays.js

@@ -21,3 +21,11 @@ export function closest(array, value) {
 
     return array.reduce((prev, curr) => (Math.abs(curr - value) < Math.abs(prev - value) ? curr : prev));
 }
+
+export function fillRange(start, end, step = 1) {
+    const len = Math.floor((end - start) / step) + 1;
+
+    return Array(len)
+        .fill()
+        .map((_, idx) => start + idx * step);
+}