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Full Discussion: '*' vs. '@' in Korn Shell Array Variables
Top Forums Shell Programming and Scripting '*' vs. '@' in Korn Shell Array Variables Post 302672495 by Clovis_Sangrail on Monday 16th of July 2012 12:08:29 PM
Old 07-16-2012
'*' vs. '@' in Korn Shell Array Variables
In order to use the shellcurses functions described at:

Shell Curses function library

I am learning about ksh, which has arrays. My trusty Kochan & Wood book says that for any Korn Shell array AR :

${AR[*]} expands to all the defined array elements, and

${#AR[*]} expands to the number of array elements.

But the example programs from the above website use '@' instead of '*' in the two expressions above. Both seem to work. My sample program:

Code:
#!/usr/bin/ksh93.att
source /home/lc25487/ksh/shellcurses.ksh
 
MENU[0]="First Menu Line"
MENU[1]="Second Menu Line"
MENU[2]="Third Menu Line"
ITEMCNT=${#MENU[@]}
ITEMCNTSTAR=${#MENU[*]}
ALLITEMS="${MENU[@]}"
ALLITEMSSTAR="${MENU[*]}"
echo
echo ITEMCNT = $ITEMCNT
echo ITEMCNTSTAR = $ITEMCNTSTAR
echo ALLITEMS = $ALLITEMS
echo ALLITEMSSTAR = $ALLITEMSSTAR
echo

produces the following output (on AIX 6.1):

==========
lipossrp01ga:/home/lc25487/ksh $ ./t2.ksh

ITEMCNT = 3
ITEMCNTSTAR = 3
ALLITEMS = First Menu Line Second Menu Line Third Menu Line
ALLITEMSSTAR = First Menu Line Second Menu Line Third Menu Line

lipossrp01ga:/home/lc25487/ksh $
==========

What (if anything} is the difference between the usage of @ or * ?
 

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