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https://issues.apache.org/jira/browse/CSV-112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benedikt Ritter closed CSV-112.
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> HeaderMap is inconsistent when it is parsed from an input with duplicate
> columns names
> --------------------------------------------------------------------------------------
>
> Key: CSV-112
> URL: https://issues.apache.org/jira/browse/CSV-112
> Project: Commons CSV
> Issue Type: Bug
> Components: Parser
> Affects Versions: 1.0
> Reporter: Romain Gossé
> Assignee: Benedikt Ritter
> Labels: headers, parsing
> Fix For: 1.0
>
>
> Given a parser format for csv files with a header line:
> {code}
> CSVFormat myFormat =
> CSVFormat.RFC4180.withDelimiter(",").withQuoteChar('"').withQuotePolicy(Quote.MINIMAL)
>
> .withIgnoreSurroundingSpaces(true).withHeader().withSkipHeaderRecord(true);
> {code}
> And given a file with duplicate header names:
>
> Col1,Col2,Col2,Col3,Col4
> 1,2,3,4,5
> 4,5,6,7,8
> The HeaderMap returned by the parser misses an entry because of the Column
> name being used as a key, leading to wrong behavior when we rely on it.
> If this is not supposed to happen in the file regarding the CSV format, at
> least this should raise an error. If not we should come up with a more clever
> way to store and access the headers.
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