Apex Intermediate Progress | ( Lessons)

Lesson: 121 | keySet()

Notes
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Notes

In Apex, the keySet() method is used with a Map to obtain a set containing all the keys present in the map. This method returns a Set collection that contains all the unique keys from the map.

Here's an example:

Map<String, Integer> myMap = new Map<String, Integer>{
    'apple' => 5,
    'banana' => 3,
    'cherry' => 8
};

Set<String> keysSet = myMap.keySet();

System.debug('Keys in the map: ' + keysSet);

Output: Keys in the map: {apple, banana, cherry}

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Apex Intermediate

A. Apex DML Operations (8 lessons)

B. Apex Classes (17 lessons)

C. Apex Triggers (9 lessons)

D. Apex Exceptions (11 lessons)

E. Asynchronous Apex (6 lessons)

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G. Testing Apex (9 lessons)

H. Apex Fast Recap (142 lessons)

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Lesson: 121 | keySet()

Notes

Apex Intermediate