Shell Programming and Scripting

In fact I'd like to use int() in awk.

Code:

awk '{(int($NF)>80)?$0=$0 " Warning":X}1' urfile

Hi Gurus,

For my understanding, would anybody be able to help to explain what does this code mean and what does it do ?

Why need to use “awk” in this format? And what is the use of “split” ?

Code:

awk '/\// {split($NF,a,"%"); if (a[1]>80) $0=$0 "  Warning";}1' file

Please kindly advice.

Thanks.


Regards,
Peter

---------- Post updated at 05:38 AM ---------- Previous update was at 01:57 AM ----------

Hi rdcwayx,

Thank you for your help.

Had tested your method and it's working as expected.

Code:

awk '{(int($NF)>80)?$0=$0 " Warning":X}1' urfile

Are you able to share a little what does the above command mean? What is "$0=$0" ?

Please kindly advice.

Thanks.



Regards,
Peter

?: is a ternary operator. AWK Language Programming - Expressions

Peter..

Let's take an example:

Code:

     x>20?y=10:y=15
     x>20?y=20:1

First one says, If x>20, set 10 to y, else set 15 to y.
Now, say you dont want to do anything in the else condition, check the second example now: since we dont want to do anything, we simply put something(1 in this case) in the else clause to satisfy the syntax.

In the same lines,

Code:

(int($NF)>80)?$0=$0 " Warning":X

if your value is > 80, append warning to the line($0=$0 " Warning"), else to satisfy the syntax, something(X here).

Hope its clear now.

Guru.

Hi guruprasadpr,

Got it. Thank you for your kind explanation.


Regards,
Peter