Thanks so much for this insane one-liner. I have learnt so much about awk by writing and reading awk one liners. This will help a great deal as well.

Two questions:

What does the following mean? Is that for handling blank lines? 

or !@F;

[download]

How does, index increment for the array in the following to cover every element? 

say join ( "^", $_, @{ $h{$_} } {@w} ) for sort keys %h'

[download]

In reply to Re^2: Print something when key does not exist by jaypal
in thread Print something when key does not exist by jaypal

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