The Most Awaited Feature “List Contains” is Now Available

Yes, you heard it right! Now no more replicating List to Set. You can directly use contains over List.

Salesforce Spring ’18 Release

contains(listElement):

Same as a set, it will return true if a list contains an element.

List<String> listStrings = new List<String>();
listStrings.add(“One”);
listStrings.add(“Two”);
listStrings.add(“Three”);
listStrings.add(“Four”);
System.debug('Check Contains Four-->'+ listStrings.contains('Four'));

Output:

Check Contains Four–>True

indexOf(listElement):

You can consider as an extra feature. It returns the position of the element and if the element is no there it returns -1.

List<String> listStrings = new List<String>();
listStrings.add(“One”);
listStrings.add(“Two”);
listStrings.add(“Three”);
listStrings.add(“Four”);
System.debug(‘Index of Ten–>’+ listStrings.indexOf(‘Ten’));