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Top Forums Shell Programming and Scripting BASH script to read external file to perform text replacements? Post 302975445 by richardsantink on Monday 13th of June 2016 10:30:51 AM
Old 06-13-2016
Quote:
Originally Posted by RudiC
How about
Code:
awk 'NR==FNR {T[$1] = $NF; next} $3 in T {$3 = T[$3]} 1' FS=":" file1 FS="," OFS="," file2
Date,Title,Views,Source
21-05-16,ProdA,this_title_now_conforms,487,YouTube
26-05-16,ProdA,this_title_is_not_so_bad,38,YouTube
14-06-16,ProdB,how_to_format_reports,83,YouTube
22-06-16,ProdC,formatting_source_reports,129,Internal

I'm inclined to bet that your ~300 lines bash can be boiled down to 20 - 30 lines awk.
hi RudiC,
Thanks for the response/solution! I'm just trying to incorporate it now, and I'm wondering if you can explain how the awk command knows to replace the first field in the mapping.txt with the second field in my CSV file. I don't quite follow the logic.

Smilie

R
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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