Count the number of elements in a Set<String> that match a specific pattern. The pattern is a string that can be found at the beginning, end, or within the elements.
Examples:
Input:
set = {"ApexClass", "ApexTrigger", "CustomObject", "ApexPage"}
pattern = "Apex"
Output: 3
Explanation: "ApexClass", "ApexTrigger", and "ApexPage" all contain "Apex"
Input:
set = {"Contact", "Account", "Opportunity", "Lead"}
pattern = "t"
Output: 2
Explanation: "Contact" and "Opportunity" both contain the letter "t"
Apex Code Editor
Welcome to Lightning Challenge!
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
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.