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
Sign in to Submit

Welcome to Lightning Challenge!

Create an Account

Sign up to track your progress, earn points, and compete with others. Your solutions will be saved automatically.

Create account

How It Works

  • • Write your solution in the code editor
  • • Connect your Salesforce org to test
  • • Submit to check if your solution passes
  • • Use hints if you get stuck

Note

You can test your code by connecting to Salesforce, but to save your progress and earn points, you'll need to create an account. Your solutions and achievements will be tracked automatically once you're logged in.