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Full Discussion: awk to match and apply condtions to matchijng files in directories
Top Forums Shell Programming and Scripting awk to match and apply condtions to matchijng files in directories Post 302983745 by Scrutinizer on Sunday 16th of October 2016 04:29:50 AM
Old 10-16-2016
Quote:
Originally Posted by Don Cragun
[..]and, despite what greet_sed said, the if statements:
Code:
    if [[ -f $file1 ]]
    if [[ -f file1 ]]

(with or without the $) should have exactly the same effect when using the double square bracket conditional expressions. If you had been using test commands:
Code:
    if [ -f "$file1" ]
    if test -f "$file1"

instead of conditional expressions, then the $ would be required and double-quotes should be added to protect against filenames containing field separation characters.
Hi Don, that does not seem to be an accurate statement.

The $ is still required for variable expansions within double bracket expressions (as well as within single brackets (test commands); a difference would be the double quote protection that would be needed in the case of single brackets)

A situation where $-signs are not required for basic variable expansions are within arithmetic expressions, but that is not the case here.

So IMO greet_sed was right after all.
Last edited by Scrutinizer; 10-16-2016 at 05:44 AM..
These 3 Users Gave Thanks to Scrutinizer For This Post:
cmccabe Don Cragun greet_sed
 

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