randomiser.ts

const randomiser = (array: any[], current: number): number => 
  (current + 1 + (Math.random() * (array.length - 1) | 0)) % array.length;

// Example with array.length = 8, current = 7:
// 1. (7 + 1) = 8           // Shift start point after current
// 2. random * 7 | 0        // Get random 0-6
// 3. (8 + random) % 8      // Wrap around length, never hits 7