Autocomplete Like a Jedi: Building a Trie from Scratch

The Quest Begins (The "Why") Ever stared at a search box, typed “jav” and watched the suggestions pop up instantly—“JavaScript”, “Java”, “JAVA_HOME”—and wondered how the heck it knows what you want before you’ve even finished typing? I had that moment while building a side‑project that needed instant keyword hints. My first attempt was a naive...