Sets and Frequency Counting example 9
A focused DSA example for sets and frequency counting with output and explanation.
Sets and Frequency Counting example 9
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Input
Terminal
SuccessReady.
Run code to see output here.
What this example teaches
Sets and Frequency Counting
Output
The function returns the correct result while keeping time and space tradeoffs visible.
Line-by-line explanation
- Line 1 sets up the Sets and Frequency Counting example: function uniqueValues(values) {.
- Line 2 adds one required part of the working pattern: const seen = new Set();.
- Line 3 exposes the output so you can verify the behavior: return values.filter((value) => {.
- Line 4 adds the decision or filter that controls the result: if (seen.has(value)) return false;.
- Line 5 adds one required part of the working pattern: seen.add(value);.
- Line 6 exposes the output so you can verify the behavior: return true;.
Why this example is useful
This example is useful because it isolates sets and frequency counting without surrounding noise, so you can see the idea clearly.
Where it is used in real projects
Sets and Frequency Counting appears in real DSA work when a feature needs a clear pattern that can be reviewed and changed safely.
Beginner variation
Change one label, value or condition in the Sets and Frequency Counting example and run it again.
Advanced variation
Combine Sets and Frequency Counting with validation, error handling or reusable structure.