bash - Setting awk to variable -

i have code looks this:

awk -f'|' '{if($1 in a)print "duplicate found:" $2 " , "a[$1];else a[$1]=$2 }' dump.txt 

i need set $2 , a[$2] variable. how go doing this?

i taking file contains: value "|" filename , want set filename , value 2 different variables.

what mean set variables? these environment variables. in awk, variables start dollar sign , numeric reserved awk. these field values each line. example:

test.txt =    line 1    line 2    line 3 

the command awk '{print $4}' test.txt print out fourth field:

$ awk '{print $4}' test.txt 1 2 3  $ awk '{print $3}' test.txt line line line 

as can see: don't have set. they're automatically set awk.

if want set environment variables, can use -v parameter

awk -v search="foo" '{     if (search = $1) {        print "found string in record " nr     }' 

in above, search awk variable set equal foo.

since awk programming language, easier see what's going on correctly formatting program:

awk -f'|' '{     if($1 in a) {       print "duplicate found:" $2 " , " a[$1]     }     else {        a[$1] = $2     }  }' dump.txt 

the program taking each line. each line consists of 2 parts separated |. appears first part in key , second part data. i've created text file looks this:

this a|test a|line moans for|anchovies whom moans for|anchovies a|test again 

the first , last line should show duplicates

i took program , added few debug lines. me trace in program:

awk -f\| '{     if ($1 in a) {         print "debug: in if clause"         print "duplicate found:" $2 " , " a[$1]     } else {         print "debug: in else clause"         a[$1] = $2         print "debug: a[" $1 "] = " a[$1]     }     print "debug: $1 = " $1     print "debug: $2 = " $2 "\n" }' test.txt 

and, output

debug: in else clause debug: a[this a] = test debug: $1 = debug: $2 = test  debug: in else clause debug: a[that a] = line debug: $1 = debug: $2 = line  debug: in else clause debug: a[who moans for] = anchovies debug: $1 = moans debug: $2 = anchovies  debug: in else clause debug: a[whom moans for] = anchovies debug: $1 = whom moans debug: $2 = anchovies  debug: in if clause duplicate found: test again , test debug: $1 =this debug: $2 = test again 

taking out debug lines:

awk -f\| '{ if ($1 in a) {     print "duplicate found:" $2 " , " a[$1] } else {     a[$1] = $2 } }' test.txt  duplicate found: test again , test 

as say:

it works on my computer

(rimshot)

seriously, program suppose doing, , see do? there errors? program appears work advertised.