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Top Forums Shell Programming and Scripting Print row if value in column 1 is the first occurence Post 302175975 by Raynon on Monday 17th of March 2008 03:03:37 AM
Old 03-17-2008
Print row if value in column 1 is the first occurence

Hi All,

I would like to have a script which is able to perform the below.
Print the whole row if column1 which is "0001" for the below example is the first occurrence. Subsequent "0001" occurrence will not be printed out and so on.

Can any expert help ?

Input:

0001 k= 40
0001 k= 2
0002 k= 1
0003 k= 1
0004 k= 77
0004 k= 1
0005 k= 88
0005 k= 6


Output:

0001 k= 40
0002 k= 1
0003 k= 1
0004 k= 77
0005 k= 88
 

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srec_spectrum(5)						File Formats Manual						  srec_spectrum(5)

NAME
srec_spectrum - Spectrum file format DESCRIPTION
In this format, bytes are recorded as ASCII code with binary digits represented by 1s and 0s. Each byte is preceded by a decimal address. The file ends with a Control-C character (0x03). Size Multiplier In general, binary data will expand in sized by approximately 14 times when represented with this format (or 15 times on DOS or Windows). EXAMPLE
Here is an example Spectrum file. It contains the data "Hello, World[rq] to be loaded at address 0x0. ^B 0000 01001000 0001 01100101 0002 01101100 0003 01101100 0004 01101111 0005 00101100 0006 00100000 0007 01010111 0008 01101111 0009 01110010 0010 01101100 0011 01100100 0012 00100001 0013 00001010 ^C COPYRIGHT
srec_cat version 1.58 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Peter Miller The srec_cat program comes with ABSOLUTELY NO WARRANTY; for details use the 'srec_cat -VERSion License' command. This is free software and you are welcome to redistribute it under certain conditions; for details use the 'srec_cat -VERSion License' command. AUTHOR
Peter Miller E-Mail: pmiller@opensource.org.au //* WWW: http://miller.emu.id.au/pmiller/ Reference Manual SRecord srec_spectrum(5)
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