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Find and replace using sed

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# 22  
Old 12-14-2013
Quote:
Originally Posted by Scrutinizer
Sort by what, Akshay?
If suppose fifth field of 2nd file is not digit only alpha, and if you are replacing it with number, if you sort then number comes first right ?

Code:
$ awk 'FNR==NR{A[$1+0]; next} $3+0 in A{$5=replace}1' replace=77 FS=, OFS=, input file | sort -t',' -k5
3,5,66,K,77
3,5,66,M,77
6,9,66,J,77
1,2,33,C,B 
1,2,33,H,M 
4,8,155,H,P
5,7,44,N,U

# 23  
Old 12-14-2013
Yes that might work - provided replace contains a numerical value and the last field never does (as you mentioned)..
# 24  
Old 12-14-2013
for present example this trick will work, but it cannot be applicable for all, suppose replace is alphanumeric, Scrutinizer is there any way to sort by specific value ? for example replace=xyz12 and value=xyz12here xyz12 should come first,using only sort command
# 25  
Old 12-14-2013
Not that I know of. Another method to avoid potential memory problems would be to read the second file twice:
Code:
awk 'FNR==1{c++} c==1{A[$1+0]} c==2 && $3+0 in A{$5=replace; print} c==3 && !($3+0 in A)' replace=77 FS=, OFS=, input file file

or, using multiple lines
Code:
awk '
  FNR==1{
    c++
  }
  c==1{
    A[$1+0]
  }
  c==2 && $3+0 in A{
    $5=replace
    print
  }
  c==3 && !($3+0 in A)
' replace=77 FS=, OFS=, input file file

This User Gave Thanks to Scrutinizer For This Post:
RavinderSingh13
# 26  
Old 12-14-2013
Yes., this will avoid memory problem.
This User Gave Thanks to Akshay Hegde For This Post:
Roozo
# 27  
Old 12-14-2013
Last field will contain both alpa and numeric but the first option is working,

Thank you both..
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