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Old 12-03-2009, 02:48 AM   #1
mayankmehta83
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Registered: Dec 2009
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Question printing hh in hh:mm using "awk '{FS=":";print $1}'" misses first line of output!!


input -->
% cat file
11:30
12:20
13:10

unexpected output -->
% awk '{FS=":";print $1}' file
11:30
12
13

expected output -->
% awk '??' file
11
12
13

Please suggest what's wrong with the command. Thanks in advance.

Also consider,

% awk '{ if(NR>1) {FS=":";print $1} }' file
12:20
13

It is as if awk has decided not to work on 1st row of input supplied !!
 
Old 12-03-2009, 02:54 AM   #2
Tinkster
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Hi, welcome to LQ!

2 options.

Put
Code:
awk -F: '{....'
or
awk 'BEGIN{FS=":"}{ ... '
 
Old 12-03-2009, 02:55 AM   #3
druuna
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Hi,

awk -F: '{ print $1 }' infile

or

awk 'BEGIN { FS=":" } { print $1 }' infile

Hope this helps.
 
  


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