Apex Intermediate Progress | ( Lessons)

Lesson: 119 | retainAll(listOfElementsToRetain)

Notes
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Notes

In Apex, retainAll(setOfElementsToRetain) method retains only the elements in the original set that are contained in the specified set.

Here's an Example:

Set<String> stringSet = new Set<String>{'apple', 'banana', 'cherry', 'orange'};

Set<String> elementsToRetain = new Set<String>{'apple', 'orange'};

stringSet.retainAll(elementsToRetain);

System.debug('Set after retaining elements: ' + stringSet);

Output: Set after retaining elements: {apple, orange}

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Lesson: 119 | retainAll(listOfElementsToRetain)

Notes

Apex Intermediate