Use of Shift command


 
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# 1  
Old 11-03-2011
Use of Shift command

Hello Expert

Can any one please explain what is the use of shift command in general terms:

Code:
set -- $(ls -t)
	shift
	rm -Rf $*

what is the use of shift command over here.

Thanks a lot for your help
# 2  
Old 11-03-2011
Try this to get the concept...
Code:
[root@bt] $ cat run
#!/bin/bash

set -- "1" "2" "3" "4" "5"
echo $*
shift
echo $*
shift
echo $*
shift
echo $*

Output
Code:
[root@bt] $ ./run
1 2 3 4 5
2 3 4 5
3 4 5
4 5

It will shift the arguments from right to left
Lets say, you have 3 arguments i.e. $1=a, $2=b, $3=c
Now you "shift" and try priting $1, it will print "b" and $2 will be "c" and there will no $3

HTH
--ahamed
This User Gave Thanks to ahamed101 For This Post:
# 3  
Old 11-03-2011
Awesome!!!! Thanks a lot
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