String, Integer, Array, Associative Array - ksh variables

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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[*]}

(written 2008-05-30)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles

A172 - Web Application Deployment - Korn Shell - interactive and programming facilities
  [1660] Korn shell - some nuggets - (2008-05-30)
  [1658] Some useful variables and settings in the Korn Shell - (2008-05-30)
  [1367] korn tips - some useful korn shell techniques - (2007-09-25)
  [1365] Korn Shell scripts on the web - (2007-09-25)
  [1364] Korn shell course - resources - (2007-09-24)
  [1361] Korn shell course - (2007-09-22)

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Some useful variables and settings in the Korn Shell

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Korn shell - some nuggets

Some other Articles

Python in an afternoon - a lecture for experienced programmers
Westonbirt Arboretum Postcode
Equality, sameness and identity - Python
String, Integer, Array, Associative Array - ksh variables
Farewell, Newcastle to Stavanger, Haugsund and Bergen
Be careful of misreading server statistics
A date for your diary - 16th July 2008
The old sayings are the best (FSB)

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