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Top Forums Shell Programming and Scripting Print matching fields (if they exist) from two text files Post 302988528 by gacanepa on Tuesday 27th of December 2016 02:57:03 PM
Old 12-27-2016
Tools Print matching fields (if they exist) from two text files

Hi everyone,
Given two files (test1 and test2) with the following contents:
test1:
Code:
80263760,I71
80267369,M44
80274628,L77
80276793,I32
80277390,K05
80277391,I06
80279206,I43
80279859,K37
80279866,K35
80279867,J16
80280346,I14

and test2:
Code:
80263760,PT18
80279867,PT01

I need to do some kind of join to obtain this result:
Code:
80263760,PT18
80267369,M44
80274628,L77
80276793,I32
80277390,K05
80277391,I06
80279206,I43
80279859,K37
80279866,K35
80279867,PT01
80280346,I14

In short:
  1. Join on 1st field of both files.
  2. If a value in field #1 exists in test2, replace field #2 in test1 with field #2 in test2.
  3. Else, leave field #2 in test1 intact.
I tried with the following join command:
Code:
join -t, -1 1 -2 1 -o 1.1 2.2 -a 1 -a 2 test1 test2

but it only complies with requirement 2 above and leaves non-matching fields empty:
Code:
80263760,PT18
80267369,
80274628,
80276793,
80277390,
80277391,
80279206,
80279859,
80279866,
80279867,PT01
80280346,

Any ideas will be more than welcome.
Thanks in advance.
This User Gave Thanks to gacanepa For This Post:
 

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IRSEND(1)							   User Commands							 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.9.0-pre1 October 2010 IRSEND(1)
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