replace blank field in file 2 with content of file 1

09-07-2011

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replace blank field in file 2 with content of file 1

Something like vlookup in excel, column 2 in file 2 is blank and should be replaced by column 2 in file 1 based on comparing column 1 in both files.

file1

Code:
1234~abc~b~c~d~e~f~g~h~09/10/09
5678~def~b~c~d~e~f~g~h~12/06/10
8910~hij~b~c~d~e~f~g~h~03/28/13
1023~klm~b~c~d~e~f~g~h~07/29/11
file2

Code:
1234~ ~b~c~d~e~f~g~h~09/10/09
1234~ ~b~c~d~e~f~g~h~11/12/10
1234~ ~b~c~d~e~f~g~h~12/06/10
5678~ ~b~c~d~e~f~g~h~01/11/11
5678~ ~b~c~d~e~f~g~h~03/28/13
8910~ ~b~c~d~e~f~g~h~07/29/11
1023~ ~b~c~d~e~f~g~h~10/22/09
1023~ ~b~c~d~e~f~g~h~04/22/14
desired output

Code:
1234~abc~b~c~d~e~f~g~h~09/10/09
1234~abc~b~c~d~e~f~g~h~11/12/10
1234~abc~b~c~d~e~f~g~h~12/06/10
5678~def~b~c~d~e~f~g~h~01/11/11
5678~def~b~c~d~e~f~g~h~03/28/13
8910~hij~b~c~d~e~f~g~h~07/29/11
1023~klm~b~c~d~e~f~g~h~10/22/09
1023~klm~b~c~d~e~f~g~h~04/22/14

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09-07-2011

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Code:

$
$ cat file1
1234~abc~b~c~d~e~f~g~h~09/10/09
5678~def~b~c~d~e~f~g~h~12/06/10
8910~hij~b~c~d~e~f~g~h~03/28/13
1023~klm~b~c~d~e~f~g~h~07/29/11
$
$ cat file2
1234~ ~b~c~d~e~f~g~h~09/10/09
1234~ ~b~c~d~e~f~g~h~11/12/10
1234~ ~b~c~d~e~f~g~h~12/06/10
5678~ ~b~c~d~e~f~g~h~01/11/11
5678~ ~b~c~d~e~f~g~h~03/28/13
8910~ ~b~c~d~e~f~g~h~07/29/11
1023~ ~b~c~d~e~f~g~h~10/22/09
1023~ ~b~c~d~e~f~g~h~04/22/14
$
$ awk -F[~] 'BEGIN {OFS="~"} NR == FNR {x[$1] = $2} NR != FNR {$2=x[$1]; print}' file1 file2
1234~abc~b~c~d~e~f~g~h~09/10/09
1234~abc~b~c~d~e~f~g~h~11/12/10
1234~abc~b~c~d~e~f~g~h~12/06/10
5678~def~b~c~d~e~f~g~h~01/11/11
5678~def~b~c~d~e~f~g~h~03/28/13
8910~hij~b~c~d~e~f~g~h~07/29/11
1023~klm~b~c~d~e~f~g~h~10/22/09
1023~klm~b~c~d~e~f~g~h~04/22/14
$
$
$
$ perl -F[~] -lane '$ARGV eq "file1" ? $x{$F[0]}=$F[1] : print join "~",($F[0],$x{$F[0]},@F[2..$#F])' file1 file2
1234~abc~b~c~d~e~f~g~h~09/10/09
1234~abc~b~c~d~e~f~g~h~11/12/10
1234~abc~b~c~d~e~f~g~h~12/06/10
5678~def~b~c~d~e~f~g~h~01/11/11
5678~def~b~c~d~e~f~g~h~03/28/13
8910~hij~b~c~d~e~f~g~h~07/29/11
1023~klm~b~c~d~e~f~g~h~10/22/09
1023~klm~b~c~d~e~f~g~h~04/22/14
$
$

tyler_durden

Last edited by durden_tyler; 09-07-2011 at 02:52 PM..

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replace blank field in file 2 with content of file 1

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