Find the column names that appear more than once in the header of TSV contents.
Names are compared exactly as written; padded and blank names are not counted (see findHeaderProblems).
The contents of a TSV file.
Each repeated name once; empty when every name is unique.
Find the column names that appear more than once in the header of TSV contents.
Names are compared exactly as written; padded and blank names are not counted (see findHeaderProblems).