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Remove Duplicate Lines Field Guide: The Five Edge Cases Behind Every “Just Dedup It”
The fastest way to dedupe a long list of lines is rarely a custom script.…
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Why Two Rows That Look Like Duplicates Are Not Always the Same Person: A Field Guide to Multi-Column CSV Deduplication
Why Two Rows That Look Like Duplicates Are Not Always the Same Person: A Field…
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The Three Switches That Decide Whether Your Duplicate-Line Count Is Real
Three switches decide every deduplication: mode, case sensitivity, and trim. Get any of them wrong and your deduplicated output is either a bloated list or an aggressive cleaner that threw away 30 percent of your data.