Code AnalysisHard 180s

Sparse Array

Read the code and determine the output.

Starter code

const a=[1,,3];console.log(a.length);console.log(a.map(x=>x*2))

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.