ENHANCEMENT: using the header from a delimited file

[Cook, Malcolm]

Is there any hope of supporting the use of the symbolic replacement string that 
referred to column names taken from the header line of an input file.

If supported, say with new option --header, you could provide a new example, 
such as

EXAMPLE: Use a table as input USING SYMBOLIC REPLACEMENT STRINGS

       Content of table_file.tsv:

         f1<TAB>f2
         foo<TAB>bar
         baz <TAB> quux

       To run:

         cmd -o bar -i foo
         cmd -o quux -i baz

       you can run:

       parallel -a table_file.tsv --header --colsep '\t' cmd -o {f1} -i {f2}

I'm sure there are lots of complications (duplicate names in header, odd 
character encoding), and perhaps the need is best met through piping input 
through `sed` or `perl`.

I am interested in your perspective.  I expect you've already thought about it 
and perhaps rejected it....

Best,

Malcolm Cook
Computational Biology - Stowers Institute for Medical Research