This question runs in a pre-configured Salesforce environment - no personal connection required.
Return counts of Contacts grouped by email domain. Only include Contacts where Email is not null. Return an empty map if none found.
Examples:
Output: { 'example.com': 10, 'salesforce.com': 4 }
Apex Code Editor
Welcome to Lightning Challenge!
How It Works
- • Write your solution in the code editor
- • This challenge runs without connecting your own org
- • Submit to check if your solution passes
- • Use hints if you get stuck
Contest Alert
🏆 #CodeEveryDay July 2026
Contest runs July 1 - 31. Complete challenges to climb the leaderboard!
Only the 31 daily challenges shown during this contest count toward points. Earlier dailies don't carry over.