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https://issues.apache.org/jira/browse/CSV-121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14029272#comment-14029272
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Gary Gregory commented on CSV-121:
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I Added the format setting {{ignoreEmptyHeaders}}, which defaults to false to
keep the IAE as the default behavior.
{noformat}
commit -m "[CSV-121] Exception that the header contains duplicate names when
the column names are empty. Added the setting ignoreEmptyHeaders, defaults to
false to keep the IAE as the default behavior."
C:/vcs/svn/apache/commons/trunks-proper/csv/src/test/java/org/apache/commons/csv/CSVParserTest.java
C:/vcs/svn/apache/commons/trunks-proper/csv/src/main/java/org/apache/commons/csv/CSVFormat.java
C:/vcs/svn/apache/commons/trunks-proper/csv/src/main/java/org/apache/commons/csv/CSVParser.java
C:/vcs/svn/apache/commons/trunks-proper/csv/src/changes/changes.xml
Sending
C:/vcs/svn/apache/commons/trunks-proper/csv/src/changes/changes.xml
Sending
C:/vcs/svn/apache/commons/trunks-proper/csv/src/main/java/org/apache/commons/csv/CSVFormat.java
Sending
C:/vcs/svn/apache/commons/trunks-proper/csv/src/main/java/org/apache/commons/csv/CSVParser.java
Sending
C:/vcs/svn/apache/commons/trunks-proper/csv/src/test/java/org/apache/commons/csv/CSVParserTest.java
Transmitting file data ...
Committed revision 1602206.
{noformat}
> IllegalArgumentException thrown when the header contains duplicate names when
> the column names are empty.
> ---------------------------------------------------------------------------------------------------------
>
> Key: CSV-121
> URL: https://issues.apache.org/jira/browse/CSV-121
> Project: Commons CSV
> Issue Type: Bug
> Reporter: Sebastian Hardt
> Fix For: 1.0
>
>
> When having a header like a,,c,d,, an IllegalArgumentException("The header
> contains duplicate names: " +Arrays.toString(header) is thrown because empty
> header names are treated as a header with name. I sended in a pullrequest at
> github: https://github.com/apache/commons-csv/pull/2
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