URLTO GUIDE
Remove duplicate lines while preserving first-occurrence order
Duplicate removal is not sorting. Check the result using first-occurrence order.
URLTO editorial · Updated
Input and processing example
Compare it yourself · Illustrative example
입력 / Input: B A B C A 결과 / Result: B A C
Steps to verify
- Keep the original order.
- Inspect the deduplicated output.
- Compare first-occurrence order.
How to interpret the result
B remains first, followed by A and C. Later repeats are removed without alphabetical reordering.
Deciding what to do next
First order can matter for priorities. If sorting is needed, review it separately after deduplication.
Feature scope
Keep first-occurrence order while removing matching strings, with trim and empty-line options and case-sensitive comparison, not semantic merging.
Frequently asked questions
Does it retain the last occurrence?
The current flow preserves first occurrence.