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Problem related to awk

 
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# 1  
Old 07-23-2007
Problem related to awk
Hi,

can anyone explain me the following command.

awk '{y=x "\n" $0; x=$0};END{print y}' file_name


Regards
Rochit
# 2  
Old 07-23-2007
Hey Rochit...

As a one-liner, It looks like a convoluted way to prepend a carriage return to the text input from "file_name" (which would be the path to your text file). The same result can be obtained many ways, one would be:

awk '{print "\n" $0}' file_name

The text of file_name is assigned to $0, which is concatenated with the carriage return "\n" and printed to the screen.

The example you provided just adds the variables x and y. x is assigned the text value of the input for $0. Then a carriage return "\n" is prepended to x. Then x is assigned to y, which is printed to the screen.

Hope this helps some....Cassj
# 3  
Old 07-23-2007
hi

the function of one-liner i have given is same as

tail -2 file_name

but the thing is I am not getting how is it displaying only 2 records.... I am not able to understand its working....

Regards
Rochit
 
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