Hi Monks

I'm stuck trying to extract the Trailer count from a file that contains a Header and Trailer within brackets.

I have the following one-liner so far, but it doesn't quite get exactly what i need

perl -ne 'print "$1\n" if /\[(.*?)\]/;' <filename>

Sample input looks like this: 

[HDR20140110230120]
--data content--
[TRL345]

[download]

The data content is swift data and is not surrounded by brackets so is not relevant for this example.

My expected result would be 345 in this example. Also, other samples of what the trailer record could be are:

 [TRL0] or [TRL25678]

It's a variable length count with no leading zeroes.

Any help would be greatly appreciated

thanks

In reply to extract trailer count one liner by dirtdog

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