All challenges
Code AnalysisBeginner 45s

Map operations

What does this code output?
Starter code
const m = new Map();
m.set('a', 1);
m.set('a', 2);
console.log(m.get('a'));

Think you can answer under pressure?

Get matched and answer live questions in 3-minute 1v1 battles. Elo ranking, badge tiers and bragging rights on the line.

Play this in a 3-minute battle