Start here: close your known gaps

These are the precise things that came up in your recent interviews. They’re not deep weaknesses — they’re quick fixes. Clear them in the first few days and start the 8-week plan from a position of confidence.

Your checklist

1. Two-pointer “move zeros” — the array-compaction pattern you stumbled on. → Move Zeroes lesson
2. The JS prototype chain — __proto__ vs prototype, and why class is sugar. → Prototype chain
3. useImperativeHandle + forwardRef — exposing methods from a child via ref. → useImperativeHandle
4. RN architecture — bridge vs JSI/Fabric, the three threads. → RN architecture
5. Frontend system design — a repeatable framework so the format isn’t new. → Frontend framework

How to use this platform

• Read a lesson, then play with its visualizer — step through, change the input, watch it run.
• Hit ＋ Add to flashcards on anything you want to retain; the flashcards page resurfaces it on a spaced schedule.
• Mark mastery (Learned → Practiced → Can teach) to track real understanding, not just “read it.”
• Drill out loud in Mock Mode, and log every miss in your Mistakes Log.
• Everything saves locally and works offline — install it as an app from your browser’s address bar.