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Full Discussion: Match and Merge two file
Top Forums UNIX for Beginners Questions & Answers Match and Merge two file Post 302997363 by RudiC on Friday 12th of May 2017 04:22:17 AM
Old 05-12-2017
Hmm - throwing dice - mumble mumble - throwing bones - waffle waffle - consulting crystal ball - cogitate - reading coffee grounds ...
How about (applying utter fantasy)
Code:
awk '{getline TMP < FN; if (substr(TMP, 1, 1) == substr ($0, length)) print $0 substr (TMP, 2) }' FN="file2" file1
1234
1237

If you consider the complex heuristic process above, how about considering and applying Don Cragun's hints?
 

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line(1)                                                            User Commands                                                           line(1)

NAME
line - read one line SYNOPSIS
line DESCRIPTION
The line utility copies one line (up to and including a new-line) from the standard input and writes it on the standard output. It returns an exit status of 1 on EOF and always prints at least a new-line. It is often used within shell files to read from the user's terminal. EXIT STATUS
Exit status is: 0 Successful completion >0 End-of-file on input. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
sh(1), read(2), attributes(5) SunOS 5.10 1 Feb 1995 line(1)
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