Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

map entry

One key together with its value inside a map.

A Map.Entry<K, V> with getKey(), getValue() and setValue(v); a map's entrySet() is the set of its entries.