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Full Discussion: Help with awk issue
Top Forums UNIX for Dummies Questions & Answers Help with awk issue Post 302945460 by jhaneyzz on Friday 29th of May 2015 01:26:05 PM
Old 05-29-2015
Help with awk issue
OK, so I am trying to use awk as a method of accessing a table stored in a file to then provide the capability of a look up table.

The table is stored in a file named "/Users/jhaney/Desktop/assetTypeMapping.tsv" and looks like this:

Code:
aCategory	aLetter	aNumber
AssetCat1	A	123		
AssetCat2	B	124				
AssetCat3	C	125

The file is tab delimited because there is all likelihood that some of the fields will contain space characters and records are separated by UNIX new line characters.

-----------------------
proof of concept:

Code:
#!/bin/sh
#basefilename= echo | basename "$filePath"
luVal="WebAssets"
inputFile="/Users/jhaney/Desktop/assetTypeMapping.tsv"
myResult=`echo | awk -v lookupVal="$luVal" '$1 == lookupVal { print $2 }' "$inputFile"`
echo "$myResult"

This script works great and does exactly what I want it to do.

-----------------------
The problem:

As aforementioned, I would like the freedom of allowing space characters in the data table. However, awk considers spaces to be field separators.

I have seen examples of how to set the field separator:

Code:
awk 'BEGIN { FS = "tab character would go here" } ; { print $2 }'

But I just can't figure out how to combine the two ideas together.

I tried:
Code:
myResult=`echo | awk 'BEGIN { FS = "	" } ; { -v lookupVal="$luVal" $1 == lookupVal { print $2 }}' "$inputFile"`

But I keep getting awk syntax errors no matter how I combine the args.


So, basically, I want to search the first field of each line for "lookupVal" and, when found, return the second (or third, or fourth) field in that record.



Can anyone set me straight?
Last edited by Scott; 05-29-2015 at 03:16 PM.. Reason: Please use code tags
 

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LEARN ABOUT SUSE

igawk

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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