DRY / KISS / YAGNI rules

[mahammad-mostafa]

✅ Very good use of destructuring & arrow functions in ES6 to adhere with KISS principle.
✅ Good limiting functions to have a single responsibility.

❓ No invalid output handling from searchIndex function leading to repeated conditions in several functions.
🔍 searchIndex = (index) => this.items.findIndex((item) => Task.compareTask(item, index)).
💡 Use short-circuit evaluation to always return a false value incase of invalid output.