« Some useful variables and settings in the Korn Shell | Main | Korn shell - some nuggets »
May 30, 2008
String, Integer, Array, Associative Array - ksh variables
• In the Korn Shell, variables default to be being strings ...
$ r 26
kay=7
$ r 30
while (( $kay>3 )); do
echo $kay
kay=$kay-1
done;
7
7-1
7-1-1
7-1-1-1
$
• ... but you can declare them as integers.
$ integer kay
$ kay=7
$ kay=$kay-1
$ echo $kay
$ (( g = 8+8 ))
$ echo $g
16
$ h=8+8
$ echo $h
8+8
• Variables can also be arrays
• and even associative arrays (i.e. with named elements)
$ typeset -A stuffing
$ stuffing[turkey]=sage
$ stuffing[chicken]=onion
$ print ${stuffing[turkey]}
sage
$
You can get out the keys and the values to iterate through them ...
typeset -A places
places[Bristol]="Temple_Meads"
places[Radstock]="Shut_Doen"
print ${places[Bristol]}
print ${places[Radstock]}
# Values
print ${places[*]}
# keys
print ${!places[*]}
Posted by gje at May 30, 2008 08:28 AM