On Thu, 2006-05-25 at 10:55:51 +1000, Tien Pham sent:
>Dear all
Hi Tien

>I have a very large file containing 7000 lines of data in a
>single column.  Below is a sample. Many of them are 7 digit
>numbers and others are 8 digit numbers. For those 7 digit
>numbers, I need to add number 0 at the beginning of it. Can
>someone please show me a command to do it all in one hit? Those
>7 digits numbers have no regular patterns, except that they have
>7 digits, and the order of all numbers in the column has to
>remain unchanged.

On every line that has exactly seven digits replace the match
with a zero followed by the entire match.

See :help :s

>Your help is greatly appreciated.
You're very welcome;


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