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https://issues.apache.org/jira/browse/CSV-247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary D. Gregory resolved CSV-247.
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Resolution: Fixed
I think this works as designed in git master, please see
https://issues.apache.org/jira/browse/CSV-247
Note that using
{{[withHeaders()|https://static.javadoc.io/org.apache.commons/commons-csv/1.7/org/apache/commons/csv/CSVFormat.html#withHeader-java.lang.String...-]}}
without any arguments uses the first line as the header line.
> A single empty header is allowed when not allowing empty column headers.
> ------------------------------------------------------------------------
>
> Key: CSV-247
> URL: https://issues.apache.org/jira/browse/CSV-247
> Project: Commons CSV
> Issue Type: Bug
> Affects Versions: 1.7
> Reporter: Alex Herbert
> Priority: Minor
> Time Spent: 40m
> Remaining Estimate: 0h
>
> If the settings are not allowing empty columns headers you can currently use
> a single empty header. This is because column headers are only checked for
> empty when they are duplicates. So it is the second empty header (the first
> duplicate) that raises an error. This test should pass but does not:
> {code:java}
> @Test(expected = IllegalArgumentException.class)
> public void testHeadersMissingOneColumnException() throws Exception {
> final Reader in = new StringReader("a,,c,d\n1,2,3,4\nx,y,z,zz");
> CSVFormat.DEFAULT.withHeader().parse(in).iterator();
> }
> {code}
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